UEFI Explained: Windows 10/11 and UEFI

[@scottbrookes8297]

Hello from the UK and thank you for all the hard work making these video. I’ve been working as a support tech at various levels for 10 years and find them very informative and a good refresh lesson

[@TechsavvyProductions]

Thank you for sharing and leaving an encouraging word!

[@sultanmm2012]

Best video to explain UEFI. I finally understood it after many confusing videos out there. Thank you.

[@TechsavvyProductions]

Glad it helped!

[@themevrouwdewi]

This is an amazing video! I'm currently studying for my compTIA A+ certification and I always end a chapter with looking up videos for additional/repeat information. I'll check out your other videos as well.

[@TechsavvyProductions]

Glad you enjoyed and found them helpful!

[@istvanrolandosz644]

Your videos are golden Mr. Vanderpool. Thank you very much for taking the time and effort to record and upload them, much appreciated.

[@TechsavvyProductions]

You are very welcome

[@LokiDaFerret]

Hands down the best explanation of UEFI that I found on KZbin. Thank you!! 👍

[@TechsavvyProductions]

Thank you for your support of the channel!

[@naveenyadav3068]

Everytime when i watch your lectures i find new thing. Sir, you did a great job . Your lecturs are more practical stuff which help to understand the theory behind the OS.

[@TechsavvyProductions]

We always enjoy hearing from our viewers! Thanks for watching!

[@shadow86sk]

thank you for this video, my Dad's Laptop was in Bios mode I found out, then thanks to the MBR2GPT tool in windows, I coverted it to GPT. Thank you. Greeting from Slovakia.

[@TechsavvyProductions]

We love those folks from Slovakia! Blessings Thank you for watching!

[@captainfuture2882]

I have a Windows 10 installation (BIOS) without a separate system partition and tried to convert it via mbr2gpt.exe but it didn't work. So I ended up again at your channel. Hopefully I can solve the problem and then post a detailed solution for other people here. Thanks for your great videos!

[@TechsavvyProductions]

Thanks for the comment and for watching!

[@P1utia]

Actually, MBR2GPT is buggy on some Windows versions, i tested it on Windows 7 system with Windows Loader in it and it got stuck at Startup Repair after that.

[@brendanfay5021]

Thank you. This has been really helpful to someone who only learned, debugged and did forensics on BIOS/MBR/VBR etc and is new to UEFI.

[@TechsavvyProductions]

Thanks for watching!

[@jakubrusiecki1640]

Great content. Most important, great style - simple, precise English, effective use of video time. My time. Thanks.

[@TechsavvyProductions]

Glad it was helpful!

[@freeandhappy8562]

Thank you Sir! We appreciate you explaining these advanced IT subjects. Please keep them coming!

[@TechsavvyProductions]

Thank you for your encouraging comments!

[@felixtan796]

I'm having problem to install Win10 on my new Dell Optiplex 3070 DOS and have no clue how to solve it. learnt a lot about UEFI from here and it helps me to understand the basic concept of BIOS boot vs native UEFI boot. Finally I manage to get my new pc with Win10 installed. Thank you very much.

[@TechsavvyProductions]

Awesome!

[@technobrend0]

Lowell your videos are absolutely fantastic.

[@TechsavvyProductions]

Thank you for your comment and for watching!

[@Kidney_Thief]

This was very helpful. I'm going to use what I learned tomorrow. I installed Windows 10 without checking the BIOS settings

[@TechsavvyProductions]

Thanks for watching!

[@bsfatboy]

lol, you were probably recording late at night and didn’t want to disturb anyone when you recording that one part. So ASMR

[@TechsavvyProductions]

Thanks for watching!

[@marcostapia7541]

If isn't broken, don't fix it. From my point of view, UEFI brings more problems than solutions. I bet most people looking to this kind of videos are to solve a UEFI problem rather than improve their systems. But anyways you are doing a great job!!

[@TechsavvyProductions]

I agree with "If it isn't broken, don't fix it" learned that the hard way, but UEFI was fixing a major problem with computer firmware. The older BIOS were written in assembly languages that most developers were not experienced in coming out of universities, and moving the PC platform forward with new features were going be very difficult with BIOS. You are correct UEFI does bring new problems but the many new solutions and features should be worth the pain. Thanks for the comment!

[@imichux14]

Really nice and informative video, I had some doubts about the booting process of Windows and this helped me to clarify those doubts.

[@TechsavvyProductions]

Thanks for watching!

[@davejoseph5615]

When your coin cell battery dies... and your computer reports an invalid partition table... that is when you learn to select the bios checkbox for UEFI.

[@TechsavvyProductions]

Thanks for watching!

[@baconsledge]

Best explanation and all you need to get a grasp of UEFI. Well done!

[@TechsavvyProductions]

Glad it helped!

[@HabibRobert]

Love it!!! Great tutorial. So thoroughly explained. Thank you!!! I do have a question for you...Just curious... What is that widget on your desktop's upper right corner I see in 6:10min? What's the apps' name?

[@TechsavvyProductions]

I believe that was an ASUS board app for viewing network traffic, I try out lots of software and general if it does not prove really useful it goes. I do not remember the name sorry.

[@HabibRobert]

@@TechsavvyProductions I understand. I do the same thing. Always testing all kinds of things. Thank you for replying and for this WONDERFUL tutorial on UEFI.

[@cjhnsn20]

always great videos! thank you!!

[@TechsavvyProductions]

Thank you for your encouraging comments!

[@bfxdamo6384]

yours is perfect. These are going to takes loads of ti off the learning process.

[@TechsavvyProductions]

Thank you for the comment and for watching!

[@Velo1010]

Thank you for producing these videos. They are actually in english.

[@TechsavvyProductions]

Thank you for watching

[@alexlu9101]

Hello Mr Vanderpool, I have a question about the efi partition, in your video , you explain how does the firmware know to find this path (\EFI\Microsoft\Boot), it is becuase this information is put into the firmwares NVRAM by windows. so the quesiton is : this information is put into NVRAM during the windows installatoin by windows ? or when ? To my knowlege , Firmware is software code that was burn into chip on motherboard , the firmware can not be changed , but if windows "put" some info into NVRAM in order to let firmware can find windows files, that means firmware can be changed ? or it just change the configuration of UEFI , not the fireware code itself. Could you please explain this a little more ?

[@TechsavvyProductions]

Great question, remember all firmware have read-write memory, we use to call it CMOS, today it is called NVRAM. So the firmware that boots the motherboard is only overwritten when we "flash" the firmware. But users configure their motherboard using the menus to boot to certain drives, configure memory speeds, enable virtualization and more and those settings are saved in NVRAM. Windows, when it installs uses this NVRAM to store variable like path and file names.

[@alexlu9101]

​@@TechsavvyProductions Thanks so much

[@KittySYT]

Thank you for explaining it really well. I always had 'Auto' for CSM and thought Windows 10 needed it in order to install my Nvidia GPU card and ASUS WiFi PCIe Lan card. Even though the machine came with Windows 8.

[@TechsavvyProductions]

If you can enable secure boot and other security features for your operating system.

[@RamisDad]

What a fantastic video, thank you!

[@TechsavvyProductions]

Glad you enjoyed it!

[@saleh3521]

This is for old hardware correct? All new motherboards now use UEFI and GPT.

[@TechsavvyProductions]

UEFI requires GPT partitions on boot drive. You must convert your NTFS drivers to GPT prior to turning on UEFI.

[@ThoughtfulAl]

Leet stuff! Thanks for this detailed info video! Now I know we don't need to format and reinstall Windows just to change to native UEFI.

[@TechsavvyProductions]

Thanks for the comment and for watching our channel!

[@EurekaRecycler]

Thanks. Do you have a video on how to boot to CD or USB with a UEFI systems?

[@TechsavvyProductions]

kzbin.info/www/bejne/qaGbc6idh56lgdk Rufus is wonderful software allowing you to create a bootable USB drive with Windows. It supports UEFI.

[@netneedingsystems2318]

Thank you for sharing!

[@TechsavvyProductions]

Thank you for your support!

[@einsteinwallah2]

everything is clearly explained ... really superlative video ... thank you

[@TechsavvyProductions]

Thanks for watching!

[@aysaraliwie6880]

Great video Mr.vanderpool thank you very much .

[@TechsavvyProductions]

Thank you for your encouraging comments!

[@xGamingWithJasonx]

I know this is an old video, but I have the MSI MPG X570 Gaming Plus motherboard, and my bios says that it is set to CSM, but under all my system information it says bios mode: UEFI and my partitions are all GPT for my volume on all my drives, my NVME, and my SSDs are all GPT, so my question is why is CSM enabled in my Bios when everything says UEFI? is it bad that my bios says CSM?

[@TechsavvyProductions]

Great question, I am puzzled also. Have you flashed your checked for an update for your firmware? If you can flash it I would try. If not and you are not having issues, leave it alone.

[@xGamingWithJasonx]

@@TechsavvyProductions I have already flashed to the newest bios, idk it's weird everything is fine, but in my bios it says CSM is on, but everything else is UEFI as I say and my drives are all GPT. Idk I have no issues at all, but I can't understand why CSM is on and I'm not having any issues.

[@KittySYT]

I have one question though: Should I stick with Windows 10 default drivers when installing Windows 10 freshly with CSM disabled in UEFI Bios, or should I install old Windows 8 drivers the motherboard came with? I find third-party drivers really bad for FAN and CPU usage. The fan gets noisy. Whereas, Windows 10 default drivers keep my PC running buttery smooth.

[@TechsavvyProductions]

Always use the latest manufactures drivers, never older drivers. Windows drivers that come with Microsoft Update are usually fine.

[@arafatgeneralservices2688]

it's finally ti. i'm ready to learn.

[@TechsavvyProductions]

Thanks for watching

[@Jozua86]

This is excellent, thanks!

[@TechsavvyProductions]

Thanks for watching

[@blackfaithdoom9018]

So .... , Mr. Vanderpool ....., you are leaving me with a efi-partition mounted on my system ..., without telling me how to unmount it ...... What shoud i do ? just reboot to get the efi-partition unmounted ?

[@TechsavvyProductions]

Yes, reboot. Each boot cycle you mount the EFI partition and as the boot chain continues all is wiped as Windows takes over the boot process.

[@dhrubasarma8224]

Thanks sir for coming back.. you are best. I have learned a lot from you.

[@TechsavvyProductions]

Thank you for your encouraging comments!

[@dhrubasarma8224]

@@TechsavvyProductions it's an honour for me to get reply from you. Thank you sir for sharing your knowledge and experience with us.

[@alexlu9101]

Sorry I still have one question , when computer with BIOS enable ,then power on, then firmware will read the first sector from the first bootable hard drive. then execute the executable code to read partitions , in order to know where is the boot sector , which contains bootmgr and bcd. But if a computer with UEFI enable , when it is power on, will the firmware also read first sector of hard drive ? otherwise , how does firmware can know where is the efi partition and what is inside the efi partition , and without the content of efi partition, how does firmware can know where is bootmgr and bcd. Or it is a fix structure of efi partition ? which always begins from the first sector to xxx sector on hard drive.

[@TechsavvyProductions]

So sorry I am just getting to your comments, I hope you found a solution. Thanks for watching! I am working hard on keeping up with the great questions and comments from the KZbin community. Again apologies for not responding within a reasonable time frame.

[@boadikwabena9443]

Respect to your good work, thanks a lot

[@TechsavvyProductions]

Much appreciated!

[@valentinhorstmann6951]

Please notice that Windows does not create a MSR-Partition when you use MBR2GPT. In this case Windows is also running without any problem! You don't have a MSR-Partition when you create a Dual-Boot-System (2 x WIN10) on 2 separate Disks.

[@TechsavvyProductions]

Thank you for the comment and information. Windows continues to amaze me in their work-arounds.

[@xtiansimon]

@valentinhorstmann6951 Problems with setting up a Dual-Boot-System (Win11, Win10) on 2 separate disks is actually why I'm here. My objective is investigate running redundant systems. It was surprisingly easy to setup Win11 system with a second SSD and fresh Win10, but definitely missing was the Recovery and I'm guessing based on your comment, the MSR-Partition.

[@darcyooh9725]

I have a question, i have an old Asus Eb 1503 computer. its like a 2013 or 2012 computer and i installed windows 10 64 bit it windows 10 didn't enable or look for my the drivers for my front USB 3.0 ports on the front of the computer and no matter how hard i tried it still wasn't enabled or installed when i even tried to manually install the drivers and also gaming was a bit slower, so deleted everything and started a new fresh copy of windows 10 64 bit and i installed the UEFI version of Windows 10 64 bit and it found and enabled my front USB drivers and the system is faster but didn't understand why that was with UEFI on an old micro computer that being the Eb 1503. Another problem with the UEFI is that it doesn't have a system reserved partition compared to the regular windows 10 and win 10 UEFI won't update properly and its harder to understand why its not as easy to expand the system partion that it has for those important windows updates, its all really confusing. I was just wondering if you could explain these aspects of my questions. It would be much appreciated, also am i better off with regular windows 10 64 bit or windows 10 64 bit UEFI?

[@TechsavvyProductions]

Great questions, UEFI generally does not improve performance or "Plug and Play" the discovery of hardware. The fresh installation does make sense in allowing new hardware to be discovered and enabled. Your partitioning with UEFI does give you both a UEFI FAT partition and a System partition (boot files are stored here) and then the Windows Partition. Updates are a pain for everyone, but the older the hardware the more likely you are going to have issues.

[@jucaguima]

Excellent video, thanks!

[@TechsavvyProductions]

Glad it helped!

[@polyhydrolide]

Hi, May I know what is the motherboard that has the socketed design for the UEFI chip? Thank you :)

[@TechsavvyProductions]

That is a good question, I do not remember. Most motherboards are no longer putting these expensive sockets on the boards for firmware. Instead they are now adding backup firmware chips to the board, it is cheaper. If the board is incorrectly flashed and the chip is unbootable and second chip can boot the board.

[@toddjones2713]

What if you would like to remove the mount point? I did add mountvol X: /s and I was able to see the EFI partition. Is it safe to unmount the partition now with mountvol X: /d or /p? Thank you.

[@TechsavvyProductions]

You can remove the mount point!

[@TestTest-un7mn]

Awesome video! thank you boss!

[@TechsavvyProductions]

Glad you liked it!

[@claudiotalle6821]

I believe this is the most comprehensive video I watched on UEFI and GPT. However there is something I still don't understand fully. I wonder if there is any point to convert a MBR Windows 10 disk to GPT. The real advantage of GPT is the capability of booting from disks greater than 2TB. SSD >= 2TB are quite expensive and few needs such a space as boot disk. Windows 10 can read/write GPT extra/external disks even if it boots from MBR. So if a disk greater than 2TB is not strictly required as boot disk, what is the real advantage to convert Windows 10 from MBR to GPT? Maybe I'm wrong but as far as I know, once Windows boots, it behaves in the same way either as MBR or GPT.

[@TechsavvyProductions]

Claudio, thanks for the comment! Keep in mind UEFI requires GPT, so if you want to move to UEFI, Microsoft provides the utility to convert without the loss of data.

[@robertpearson8546]

Which really occurs first, the POST or hardware initialization? Because if the CPU or RAM is malfunctioning, how can you initialize anything?

[@TechsavvyProductions]

Power applied begins the hardware initialization, UEFI firmware also begins motherboard initialization, POST is a very basic test of system functions after initialization.

[@andreasg.1536]

Great stuff! Helped me a lot

[@TechsavvyProductions]

Glad it helped!

[@camren.m]

I have a Windows 10 and Ubuntu dual boot setup. Both are setup to UEFI with CSM. Do you know anyway I can safely convert both OSes to be able to boot in UEFI Native mode?

[@TechsavvyProductions]

Microsoft has a utility to convert basic disks to GPT partition without loss of data. Linux forums I am sure can help you with modify the boot structure of Linux to convert to UEFI. Thanks for watching.

[@megusta2620]

Can the option for CSM being default on all of the x570 motherboards be the cause of why there are so many boot issues? I have been working on my Ryzen 3900x, Asus x570 MB, GSkillz Trident Neo 32GB DDR4 3600 with a Crucial P1 1TB nvme m.2, RTX 2060 KO Ultra. Was only able to boot into windows by clearing CMOS by pulling battery. I tried everything possible with what I had to work with. Reseated everything, 1 stick (every slot, every combo), full teardown and reassembly. No pin issues, no dirt, nearly new system. Tried different ram that was slower, no difference. But if I cleared CMOS, it would eventually power up monitor with "f1 to enter setup f2 to accept defaults and continue". From there i HAD TO chose F2 to be able to boot. Even after choosing that, I would have to restart and then windows would pop after a long time. So my question is, does the fact that CSM is enabled by default the cause? I know that my m.2 drive shows in console->msinfo as UEFI. I gave up after 2 weeks of fighting this. UEFI might be all great and all, but it sure seems to be more trouble than anything. I have my old PC from a decade ago and a bunch of laptops that still work fine, before UEFI. It sort of feels like after 1999 when OBD2 changed everything for the car world and now they are a nightmare if something fails.

[@TechsavvyProductions]

Wow, I just purchased a x570 motherboard ASUS and have my Ryzen 3900 waiting for a graphics card, soon to come. This is my new video editor so I will see if I have the same issues because I do want UEFI enabled and safe boot. By the way you did a great description of your troubleshooting steps, I rarely get that in comments. kudos!! I will let you know my experience!

[@megusta2620]

@@TechsavvyProductions thanks for the video and good luck with the new setup (doubt you will need it though). Yes, these 'off the shelf' boards are being shipped with very old bios files and have CSM enabled by default. When I contacted Asus, they were aware of the situation and their resolution was sending a 'boot kit' - which is a basic AM4 processor so you can boot into bios/Uefi to update them. The whole situation is really wrong. There are infinite posts on Reddit, youtube, etc. Now for the good news- if you get it all updated and can boot to Windows, the 3900x is an absolute beast. With the setup I stated, running Cinebench or Heaven Benchmark testing is nuts. The performance is outrageous.

[@hadireg]

Feeling lucky! Thanks!

[@TechsavvyProductions]

Thanks for watching!

[@nelsono4315]

fantastic video! Thanks

[@TechsavvyProductions]

Thanks for watching!

[@rajivg7249]

Thanks again for the educative one...

[@TechsavvyProductions]

Thanks for watching!

[@ProductJunkie117]

I was iffy about UEFI but as of today I am running it natively

[@TechsavvyProductions]

Awesome! Thanks for doing and watching, what could be better?

[@ProductJunkie117]

@@TechsavvyProductions I noticed the performance almost instantaneously!

[@diaman_d]

so, MSR partition is not required on every disk as Microsoft claims, it is only usefull on a disk that has multiple partitions assigned.

[@TechsavvyProductions]

It is a partition needed for UEFI, think of UEFI as a small operating system and it uses MSR for file storage.

[@diaman_d]

@@TechsavvyProductions yes but only needed on the boot drive (partitioned drive) apparently, not on every drive attached or available to windows OS.

[@xtiansimon]

@@TechsavvyProductions To be clear, step #7 ("Finds \EFI\Microsoft\boot") on the Review slide concerns the \EFI directory on the MSR partition?

[@mnmlbaez]

I cannot get out of MBR2GPT Disk layout validation failed!!! :( its driving me crazy. I'm on a clean install of windows

[@TechsavvyProductions]

www.thewindowsclub.com/fix-mbr2gpt-failed-errors-and-issues-on-windows-10

[@whovisionsCGI]

I recently cloned a drive that was originally mbr but somehow after I had cloned I realised it had cloned it as a gpt uefi mode. It would not boot. I even changed the bios to Uefi and it still would not boot. All I got was a black screen asking me for a bootable device.

[@TechsavvyProductions]

Windows 10 startup problems: Fixing Boot Problems: kzbin.info/www/bejne/gJW1gYygjrCWb8k

[@chem2798]

Simply GREAAAAT😄

[@TechsavvyProductions]

Thank you for your encouraging comments!

[@kilroy8357]

Thank you!

[@TechsavvyProductions]

Thank you for your encouraging comments!

[@kilroy8357]

Lowell Vanderpool You’re welcome!

[@lolnjeoglondajmejejplejlis3365]

Dude please explain Advanced Programmable Interrupt Controller APIC And the difference between APIC and PIC

[@TechsavvyProductions]

Both perform the same task, allowing hardware the ability to access the CPU and software. APIC allow engineers to choose hardware that need higher priority over other devices. This article goes into a great deal of depth on what the APIC does. en.wikipedia.org/wiki/Advanced_Programmable_Interrupt_Controller#:~:text=As%20its%20name%20suggests%2C%20the,issues%20in%20multiprocessor%20computer%20systems.

[@Ak-sh6xg]

Thank you!!!!

[@TechsavvyProductions]

Thank you for your encouraging comments!

[@juniordarilson2300]

On my bios it says "windows boot policy for uefi without compatibility support module (csm), what does it mean?

[@TechsavvyProductions]

That is native UEFI, it is what most folks want.

[@juniordarilson2300]

@@TechsavvyProductions so i should use uefi (gpt)? I have 1tb hdd

[@TechsavvyProductions]

If you are using CSM, Microsoft has a utility to convert your HD to GPT and then you are ready to move to UEFI. Windows 10 is built for UEFI so if you can... move.

[@juniordarilson2300]

@@TechsavvyProductions thank you, and i want to

[@noevaiit2048]

really helpfull

[@TechsavvyProductions]

Thank you for watching!

[@erioncuka3966]

The last step when u download the update from Windows catalogue with the kb code how to install then Sorry but I stop use PC long time ago

[@TechsavvyProductions]

Erion sorry I am not understanding the question, feel free to give a little more information, Thanks!

[@aljoumeyli]

I hope UEFI and Secure Boot becomes permanent in the future.

[@TechsavvyProductions]

I agree, the internet would be safer!

[@rened4804]

Great video!

[@TechsavvyProductions]

Thank you for your encouraging comments!

[@allanrichardson9081]

My Win 10 search finds msinfo32 but not sysinfo32.

[@TechsavvyProductions]

Allan if I said "sysinfo32" which is possible, it was a mistake! Thanks for the comment and alerting me to the error.

[@allanrichardson9081]

@@TechsavvyProductions Thanks. At any rate, I got far enough to know that one of my laptops is already on full native UEFI. Haven’t checked the other one yet.

[@michelwong1]

👍

[@TechsavvyProductions]

Thank you for watching!

[@Ak-sh6xg]

Is there other lecturer like Mr Vanderpool on KZbin??

[@TechsavvyProductions]

Check out www.professormesser.com/, thanks for watching

[@m5chk1]

damn it was based! respek!

[@TechsavvyProductions]

This is an older video I do have a new UEFI video, thanks for watching! kzbin.info/www/bejne/ppLdiIWHqZJ8i6c

[@ProMonkeyZ1]

Windows is best running on MBR, especially for cloning, KISS, forget about EFI.

[@TechsavvyProductions]

Thanks for watching!

[@robertpearson8546]

I bought "Beyond BIOS" but found out that is was an extremely brief overall concept and then nothing but data structures. No intent. No algorithms. A typical bad programmer's view of code. The belief that describing a C structure implies the code.

[@TechsavvyProductions]

Thanks for watching!

[@iquittv1915]

favorite tNice tutorialng... In life. That's not an exaggeration it's actually the pinnacle of my existence, and if my life were a solar system, creating

[@TechsavvyProductions]

Thanks for watching!

[@jimspc07]

UEFI boot error. Go to this video. It will show how to solve all problems in this area! Umm Yeah!

[@TechsavvyProductions]

Thanks for watching!

[@polilla.asesina2548]

It's to loud and licky. Not nice for

[@TechsavvyProductions]

Thanks for the feedback!

[@denilsonleite7611]

rember life is short, so spend it wisely

[@TechsavvyProductions]

Thanks for watching!

[@stevenbliss989]

GPT is also in normal BIOS! You list is INCORRECT!!!!!!!!!!

[@TechsavvyProductions]

Thank you for the feedback!

[@keithwhite2986]

This video was the top result when I searched KZbin for "pmbr_boot", but if it was mentioned in the video I missed it, so I am wondering why this video appeared in the search results?

[@TechsavvyProductions]

Keith, not sure but sorry about that!

[@keithwhite2986]

@@TechsavvyProductions Not your fault, but I am puzzled by the KZbin search algorithm in this case.