What is EFI Shell and How to Use it

In this video I explain what is EFI / UEFI shell, what is startup.nsh, and how to use the EFI shell to fix and diagnose boot and bios issues.
Chapters:
00:00 intro
01:48 Tutorial
03:50 Navigating
06:35 Boot order
07:57 Booting from EFI
09:26 Flashing Bios
14:05 Recap

[@twintrigger]

Perfectly explained. Very well put tutorial. Thank you for this! I appreciate you and what you're doing. Keep it up, good sir! 💪😎

[@Florin9T]

Wow Brother, you saved my day. I bought an Acer Intel PC and this UEFI interface appeared and I hardly found anything on the Internet to start booting from USB to install windows. I am really grateful. Thank you very much! I followed your explanations and it worked perfectly. 😊

[@serdarsen6777]

bro you came in clutch, for some reason it wasn't booting from my os so I had no idea how else to boot it until I followed the steps you showed in the vid. Huge Thanks.

[@ErikS-]

This is one of the best and most informative videos that I have seen since the last few months.

[@piggyfanwhy2999]

I just want to fix my computer

[@bozmundarts2614]

Any luck yet?

[@malinadimitrijevic6984]

Hi Bro i like what u doing,First of all sry Foto my Bad eng.I Hope u can help me . I use like u in the video the command 'bcfg boot dump -b and bcfg boot mv 02 00 and it doesnt worked.The EFI shell want run this command This is Show in the command line : 'bcfg' is Not recognized as an internal or external Command,operable Programm,or batchfile.what can i do ?? My Windows normaly is C: now it is D: Icant boot Windows i want format my disk because i Need some Stuff in there.I havnt any folder calls loader Inlay one called bootx64.efi but it wannt fix my Problem ..i Hope u can help me

[@BLOOD99925]

How to fix this any solution 😭😭

[@ivantolic7429]

​@@BLOOD99925 just type exit and go to boot manager

[@Ali-yv2mr]

😅

[@chioz]

Great info, thank you for putting the essentials so well together

[@user-tv8zk3ho5r]

This was an honest presentation of this subject, funny too. I wanted to lean more about the EFI shell, for example, in linux my root drive has a different partuuid in the EFI shell, than the same root drive has after the system has fully booted up. For boot I need to find out the partuuid is in EFI. Thank you for your EFI video.

[@user-om1dg1sr1l]

Nice video. I liked your comment about finding no one in searches who rally knew about EFI Shell configuration. My exact frustration until I found your video. I was stumped on how to upgrade some LSI IT mode cards. Thanks again for all your work.

[@danbo9959]

Absolutely spot on explaining this through, only man to not waste my time apon this issue.. Thank you!

[@mcnairymichael]

I needed this sooo bad! A thousand blessing to you and your children!

[@Ethan_theatheist]

Dude thank you so much. I was trying to complete stuff for work and when I came back to my laptop I saw this screen and I got so scared I lost everything. This was perfect!

[@prettytwitch4568]

I have a problem, the bcfg command is missing. I have an EFI shell version 2.70 [5.19]. What can I do to get Windows to start right away, and not EFI???

[@niepieisme9830]

This is like the sixth video I have watched and this is actually the best video I have watched, he is very knowledgeable, but none of them have helped me.

[@groupbambouckcom969]

THANK YOU!! THIS WAS THE BEST AND EASIEST TUTORIAL

[@joegarfunkel3851]

Thank you for a wonderful presentation to explain the mysteries of the UEFI shell. Without this video I would not have been able to complete my project of loading the Chrome OS Flex bootx64.efi from my USB. Thank you again! 🙂

[@thomasrichardson8671]

My friend, I thought I was goosed till you walked into my life. Very clear and concise 👌🏼

[@johntg89]

Thanks for the really useful content!!

[@donaldwilliams6821]

Thanks for this video. Every time I tried to use EUFI in Proxmox Hypervisor it would stop at the shell. I had to disable Secure boot!! Your video led me to the answer. Much appreciated!

[@patriciaukem5738]

wowowowwowo soo happy it worked for me i watched all many KZbin didn't work but your video was EXCELLENT God bless you😄

[@brandonhayes5460]

I learned more from this than I have in days. 🙏

[@brandonhayes5460]

However by just doing the simple fs0: or fs1: I get fs1: or fs0: is not a valid mapping instead I use fs0: cd / to change dirs

[@rickdiesel01]

thanks to this i solved my problem, thanks a lot, very well explained

[@mardibenton7366]

You sir, are a legend!

[@realslickvic]

A genuis

[@lydiqbe]

This EFI crashcourse is a hidden gem video. Bless you dude

[@amx2311]

This video reached me by Google search and helped me. Thank you!

[@someguy9175]

this is such a lifesaver. thank you.

[@z1y2t3k4]

great job, keep up the good work

[@briandickinson3721]

I'm glad your video is Closed Captioned as you speak at such a blue streak pace it is hard to keep up with you. (I am getting older and need a bit more time for the words and concepts to filter in.. lol)

[@samikentta5191]

Exactly what I needed, very well explained, thanks!

[@fckdiabetes3053]

Thank you soooooo much !!🙌🏾🙌🏾🔥🔥

[@user-qs9yl3cb6b]

Thank you so much, really helpful!!

[@LadOGamming]

AMAZING video🔥thank you very much❤

[@sykotic77]

Nice! Great video for explaining efi shell.

[@Midnight_1308]

Thank you! This helps me big time! More power to you! Cheers!

[@humblepotpie3504]

your video helped me boot my laptop and install windows. thank you very much

[@saadimadismael3674]

Thank you so much bro. Sending virtual hugs. Worked like a charm ;-)

[@GurpreetSingh-si2gh]

Thanks a lot brother. It is one of the best video. Thanks.

[@reyhankeselek.1582]

It's amazing how the efi shell capability to copy and paste files saved my laptop from being a junk

[@jeromejahmari]

thank you for sharing this information

[@nar9z994]

thanks man , you saved me .

[@marcostapia7541]

Thank you brother!!

[@carlosribaltes6110]

Thank you so much for this video. Life saver (BIOS saver 😂) ❤

[@milicaj]

You're the best, you saved me

[@slickyvic]

You deserve a 100000 dollars!❤

[@linostourikis3467]

Guys don't waste time.this is very helpful by I couldn't find the EFI file in my folders FS0 or 1 or 2 so I turn off the laptop and open BIOS . IN The FAR RIGHT under Safe changes has an option EFI BOOT. I DISABLE EFI SHELL and Worked. Try it if you couldnt solve it after this so helpful video.

[@gamestoon1500]

How to enter bios

[@asyshamie4214]

Thanks alot brother 🙏

[@ajmifasal7336]

Thank you so much❤

[@lincolnb30]

Thanks, the info should be very useful for me as I try to assemble & set up a barebones mini PC. Most useful were the names of the two reference documents given at the end. The examples you showed should also be useful, if I consider them to be a sort of tutorial.

[@hobomaster6237]

cool . very helpful

[@mobhunter5676]

I got back into windows thank you for that but is there a way to make it so I don’t have to run the boot file from the efi shell every time I start my computer

[@larocdokarnap3227]

So far this has been the most useful video I've found, but i don't see any executables. I'm trying to get past the EFI menu, windows won't boot up so this is as far i can get. The MSI BIOS menu doesn't seem to have anything useful for my situation. Been messing about on and off for two years with this thing, my only achievement is getting rid of a black startup screen, so i do got access to the BIOS and the EFI menu, i just don't know what to do from here.

[@EXITZER0]

if there is no EFI executables, it's either you don't have a bootloader (accidentally removed) or it's a legacy OS install (MBR). The easiest solution would be to move your important data out and do a fresh OS install.

[@visheshsharma1541]

You just save my life

[@miguelsastre8992]

I LOVE YOU SO MUCH BRO, You are the best

[@ryukan1325]

Ive followed your instructions but when I put bcfg boot dump -b, I get a text saying 'bcfg' is not recognized as an internal or external command, operable program, or batch file, what should I do now?

[@user-to3le8pl9m]

I'm at the same point idk lmk if you found jt tho

[@raptor29aaa]

Oh my, this takes me back. I used to use commands like this all the time in windows 3.0. When I was 5 uears old, I was using dos commands just like this... wow the original substructure is the backup... cool.

[@Ali-yv2mr]

Big thanks bro

[@davidchavez1330]

Great video

[@n-uv7vg]

this video is underrated

[@pedrogonzalezgil]

TR TR TR TRIPLE THUMBS UP FOR THIS GUY! 👏🏻👏🏻👏🏻👏🏻👏🏻

[@Islamic_education_ethio]

It helped me alot sir thanks 🙏🙏🙏🙏

[@CH1CK3NM4Y0]

Perfect. Got into my Pc. How do i mow fix my PC, should it be a complete reinstall of windows?

[@markdors8047]

Bro There is executable file the green in colour but when execute it.. its said UNSUPPORTED.. there is anything i can do ?

[@adityanarayanshukla9530]

Hey, I'm unable to find the FS_ options in my mapping table and there are only BLK_, pls help me with this

[@filipdamek3531]

Many thanks for the tutorial! 🙌 Easy enough to help me understand it and detailed enough to guide me to the point.

[@viperchrisz4]

OMG thank you so much, I needed to downgrade a BIOS from a B350m MSI and they provide nothing but a message telling you you can't. IDK why MSI doesn't provide this information so you can recover your mobo instead of losing $$ on working hardware

[@bharavipeeyushkandala2093]

How to reload the shell with a command/ protocol ? basically i just want to find a way to exit and re-enter the shell type of thing in a single command/api?

[@thebasmentrejects]

What if it says map: Cannot find required map name.???

[@santoshgujar5237]

U said exactly what i did, 🙏🏼🌺😇

[@SAFT_Bananensaft]

my system is much different and nothing works. do you know how it works on other efi shell versions?

[@santoshgujar5237]

Thank you, Sir, 🙏🌺😇

[@johngessner]

My supermico scmf x9 won't boot to bios. It gets stuck with an AB error. I guess because I changed to date and time. I tried to dial the date back in the EFI shell but it won't save it so when I reboot the date is current again. Any thoughts

[@kevinmburukariuki7797]

My map sayz that it is null but this tutorial has given a lot of knowledge

[@taralombard5623]

Hi there, your video was insanely helpful, however when I try and access "cd arch" or "cd boot" it states that no directory is found and there are no files at all on the directory. Could you please give me some guidance?

[@jf3767]

When I tried this one of the FS partitions was the Windows C: partition. So it will read NTFS.

[@coreyyoung6052]

thank you kind sir

[@Georgitrifonov123]

If i boot from efi once will i have to do it everytime trough startup.nsh or not

[@joyyang3169]

thank you man

[@rwijgman8781]

thank you great

[@jdosinfo]

Thanks very much!! You is pica!

[@Nightowl_IT]

Nice video. You can edit the startup.nsh too with the edit command so it always starts a chosen bootloader. What's written on your cap?

[@zainrana270]

I love you) No viruses good version

[@pushkarmahajan8089]

Hi, thank you so much for explaining all this, APPRECIATED! For me the executables aren't able to boot the system. I am using Nvidia Orin having AArch64. I want to copy one particular work folder from memory to external USB stick. Could you suggest how to do it? In the help i couldnt see the command to do it. Thanks in advance.

[@pushkarmahajan8089]

I used "CP -r source destination" and it worked. Happy to recover work folder.

[@Devo1987]

What do I type to format and partition for windows format ?

[@bythegraceofadoni]

any idea why the bcfg boot command might not work? and why my input characters are yellow and not grey like yours?

[@Ash-Shanqiti_660]

FS0 different OS . I have a windows 10 , How do it ! For boot Efi from virtual box When I write FS0: Message : is not a valid mapping

[@brian_72]

I'm trying to change os but this efi shell always blocks

[@faladejoshuajrule2531]

Most useful videon on efi shell so far... But on my tablet there is no fs(Volume) on the mapping

[@kuperlilu5340]

Same! Mine has BLK0, BLK1 and BLK2

[@AlMamun-jw1sl]

U BEST!!!

[@elsiedavid5683]

After typing map -r it's stating. map: Cannot find required map name.

[@jonjoebytesized2041]

Mine doesn't show any fs drives but I have just installed windows 10 on this. Just doesn't boot, it sends me here. States map is missing or can't find map

[@joaopauloveloso7150]

I need help... I have a beelink Z83 PC and it is giving efi Shell error please help me... I am Brazilian but I am interested in solving this problem please help me

[@shivamagarwal8057]

Hey, I watched your video and it was quite interesting. I am facing a issue and I would really appreciate some help on it. Let me give you a bit of context, I tried running Kali Linux on UTM on my Apple MacBook Pro(M1 pro) running macOS Ventura 13.2.1. It is a part of my college project and whenever I try to run it, I encounter the same problem. But in my case the UEFI shell window shows only BLK2, BLK1 and BLK0. It does not show any FS volumes or anything. I tried every workaround but it is still not working. I would really love some help or insight on why am I getting this issue? Thank You

[@tinynature_world909]

hey did you find any way around it?

[@ra1d3r34]

Besides from you talking a bit too fast for my liking you did a fantastic job explaining EFI Shell.

[@andregomes6026]

my map didn't find nothing, it shows "No mapping found" whats should i do in this case?

[@phantinoO]

Did you figure out the problem?

[@user-xf7wk7jq2p]

Hi Team ExitZone i have a problem with my connex slim book X i does not want to exit the shell. Your help will be more sufficient. Please help. Thank you.

[@hansklausfranz878]

Hi, if i want to boot the bootx64.efi i becom the error „BIInitializeLibary failed 0xc0000185“ cant boot from rescue stick or windows boot stick. If i type date i become the error. „UEFI function ´gRT->GetTime´ returned: Device Error“ Any help? lenovo legion 5 15arh7h Win11

[@wyb.chris2x404]

How do I remove this

[@yerachmielb1]

At 10:17, you see that directory which include mb_BIOS_...? Yeah, on my PC there's no such thing. Anywhere. Help?

[@edif5652]

Great video 👌however I just need to start my windows😅 any clues how to do it 🙄

[@nurdauletsharmetov6338]

when I typed bootx64.efi it said command error status: unsupported

[@hano2424]

When I made tNice tutorials, there was no working Mac version. On mac, a right click is a 2 finger press on the track pad.