UEFI vs Legacy BIOS Boot | GPT vs MBR (DOS) | Explained

44 thoughts on “UEFI vs Legacy BIOS Boot | GPT vs MBR (DOS) | Explained”

1. I have a more complicated issue. I have 3 or 4 mbr drives that run software variation win 7, win 10, etc. They are mbr drives that I like to boot into from time to time. However, I want to add a 4tb win 11 drive. That means it has to be gpt. Is there a way of having the gpt drive bootable but still be able to boot the other mbr drives?

2. hola me pasa algo extraño con el audio suena horrible en uefi y suena excelente en legacy mode

3. IGEL 340 / GTP setup plays this video at 720p on a 1.2ghz / 1gb egpu / 4gb ddr3 / 11 Superlight 24H2 (Update 13)

4. When i am going to install windows 10 in ubantu its comes Black screen and get in to ubantu screen problem plzz how to fix it

5. yes , it especially difficult if you are using manual install or parting the drive

6. All stuff from you very great job

7. well explained, thanks

8. @TITUSTECHTIPS I WANT TO INSTALL NOBARA AND GARUDA OS WITH WINDOWS 11 BUT I HAVE LEGACY BIOS AND THAT ALLOWS ONLY 4 PARTITIONS. I HAVE 3 WITH WINDOWS BECAUSE IT INSTALLED TWO OTHER PARTITION WHICH ARE RECOVERY AND SOME OTHER THAT IS 600 MB. I WANT TO INSTALL NOBARA AND GARUDA OS WITH WINDOWS 11 AND I KNOW THERE IS A UEFI PROGRAM CALLED DUET TO HAVE GPT DISK FORMAT IN LEGACY BIOS MODE TO BE ABLE TO RUN GPT DISKS AND I WANTED TO KNOW IF I COULD USE DO THAT TO INSTALL SEVERAL OSES WITH THAT PROGRAM BECAUSE IT'S GPT. OR IS THERE A WAY TO MAKE WINDOWS 11 WITH NOBARA OS AND GARUDA OS WORK WITH LOGICAL PARTITIONS

9. I'd like indeed a few guidlines documents in order to learn much more about Grub and about Uefo that I will apply when installing linux.

10. good advice:)

11. Pure Fantasy. I doubt CAT has any plan for this in 2025, 2026, or anytime in this decade.

12. Thank you

13. This information is soooo good to have, really useful as I currently sit mid-install on my system and trying to understand what options work best for me; this is leagues better than the dozens of "Just use this partition table" recommendations I see everywhere, you really get into the what and why these kinds of partitions exist what is exactly what I needed

14. URFI is great, what isn't tho is secure boot. I can tell you and I did experience this. Now yes secure boot is more geared to windows, I don't ever use Windows at all. Yes I'm the Linux type. This computer I got was from place that refurbishes. At the time I didn't really think to look at BIOS and understand every (now I wished I did) options a few months in tho, things just started, peculiar behavior of Linux. Sometimes display would kind of flicker. So I decided better look at BIOS. I do know installing Linux can on a uefi be risky if, SB is enabled, TPM as well as fast boot and on this motherboard it was called CSM which is legacy bios. Did i turn yes but I later on is that those 3 helped to lead to this that now mobo won't post, and nothing on display. So yep. Be sure if you go refurbished if install. At least SB and fast boot is turned off. I trusted just a bit to. just I also know how to refurbish but nope never going back there. Lesson yes always disconnect internal HDD or ssd if you're that lucky and at least a Linux USB live disk as well. But yes be sure if you intend really want all SB crap or making anything secured only the fact later if your on windows, you're letting MS take over your computer instead of you. This refurbishing place should have known it's not a good thing to do that. unless one the Linux kernel has to support and get those keys right away that's the thing is I rebooted and it warned that it can't boot. I'm like what. WTF is this. At the time I didn't know much about the uefi and the more recent changes, SB and all.

15. Amazing!

16. Just talking and using acronyms ended up being vague and uninformative. 'Might or it might not' is not up the usual standards of this site and I searched elsewhere.

17. Thank bro

18. You can't install win11 if you disable uefi

19. graphical menus is evil! they are so bad on HP servers and with every generation they get worse and worse, slow and unusable.

20. Just redirect people to Google witnoit talking too much

21. Bought a new Seagate 2TB drive. Formatted it and chose MBR. I have no other plans in regards to making a new partition. Is it worth switching to GPT or am I good with MBR?

22. After i change uefi boot i cant access bios screen just black screen. I can't access bios anymore

23. We wish if there is a practical part beigin from bios setup till windows installation from both legacy and UEFI

24. "In this video, I go over…. (what the title exactly says) " – Thanks…. I thought youtube would serve me a different video than what I clicked on, or somehow the info would be in another video. Thanks for the prompt clarification.

25. Can you still use fdisk?
    How are partitions labelled w/UEFI ie /sda/sda1, 2, 3 etc.
    For windows c:
    I've heard you have disable Secure Boot to install Linux? Alot has changed since I last installed Linux. Thank you

26. I wish the industry would stop putting labels on stuff like "legacy" when it should be called "original" for example. I like the information in these videos because of my technical experience, however, I did not create such videos because I don't want to influence non-technical people to mess around with the BIOS, hardware, configurations, settings, motherboards, etc.

27. Hi Chris,

    I installed a Linux Mint in dual boot with Windows 10 on a newly built computer and I already destroyed the Grub bootloader once!
    Now I finally managed to buy a high performance graphics card, how can i safely install Garuda Linux instead of Linux Mint without destroying the grub bootloader?
    I have already experimented a lot with Virtualbox in Windows 10, tried all Linux Distros Arch, Manjaro, Debian, Fedora but this is in safe virtual environment.
    But on my new computer that should be able to run Blender smoothly, I'm afraid to do it again!
    Windows and Linux are on separate drives.
    I suspect that the grub partition is on the Linux disk, because when I formatted it I couldn't get to the Windows partition, only by reinstalling Linux Mint the grub partition was back!

    Thanks in advance for your advice

28. For MBR when you say mark the partition bootable does that mean set the boot flag as one or more of the following: boot, gios-grub, root or legacy-boot for the system partition?

    Also does the mount point need to be?

29. Excellent job reasoning forward the most effective way for a computer to behave suffering their capabilities appropriately balanced by the portion of the systems supporting each software or out of schemes into Windows processors etc etc

30. Just a minor correction. Things that are no longer approved for use are "deprecated", not "depreciated".
    "What is deprecated?
    In information technology (IT), deprecation means that although something is available or allowed, it is not recommended or that — in the case where something must be used — to say it is deprecated means that its failings are recognized."

31. da fuq man, you just make it way more complicated than it really is.

32. Am I the only one who spent half the video rejoicing at the cute snowman on the wall? 🙂

33. change speed to 1.25 for a more faster talk

34. After accidantly have cleaned my entire disk (long story) I no longer have GPT for the disk. Havent made a reserved msr and seperete system EFI in fat32 yet so dont know if that will do anything but i mean, i got no system/windows now to work with anyway so got enough of time to check out videos like this one

35. Sim mas como configuro a bicos para dar boot obrigafo

36. Thank you brethren I'm glad you've made it clear multiple times in the detailed explanation and breaking down the differences in MBR legacy and Uefi and by partition system.

37. Can you have both MBR and gpt disks in one boot loader ?

38. Excellent information

39. Feliz navidad!

40. Man! I wish I had a tenth of your knowledge🏁

41. I refuse to move away from mbr

42. Hello, just a random question, does my Pentium G620 can install 64bit Windows 7? BTW my motherboard is ECS H61H2-M2 V.1.0 my bios is not yet UEFI

43. Hi Chris. I'm 8minutes, 03 seconds into the video and have a question for you. I recently tried dual booting the latest version of ubuntu with windows 7 home premium and noticed that the ubuntu boot loader took over the loading of either windows or linux. It looked like the font size it used for the loader was extremely small and hard to read. Is there any way to inscrease the font size of this boot loader (assuming it was grub?). Thank-you!

44. On so old computer is not possible to install Windows 11 as Legacy Boot but when I change it to UEFI boot, then it is possible to install Windows 11 without any problem.
    My question is, to Keep the boot as UEFI and use the computer as it is would it harm the computer and other programs work properly?

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