Hot answers tagged uefi
You need to disable fastboot in Windows 10. You are not cold booting at the moment. If you cold boot, you will be able to use F2 as usual. Use HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Power HiberbootEnabled DWORD 0 = Turn off fast startup 1 = Turn on fast startup and then boot again to access the BIOS.
As long as you have an EFI system partition, the partition table type doesn't matter. However, Windows (uniquely) requires GPT to use EFI; this is not a problem with Linux. The following answer gives more details in regards to Windows and it's EFI support. You're not asking about safety, but about support. Yes, EFI firmware has no trouble with an MBR ...
Squircle's answer and various comments are good; however, I want to address a few points.... I don't have the CSM mode option in my UEFI. Furthermore, I can't and don't want to convert my hard drive form MBR to GPT It is possible to convert from MBR to GPT without losing data. My own GPT fdisk (gdisk) program can do this. I hear that some third-party ...
Generally the end of the disk is the slowest part ( but not hugely so ). Given that an htpc isn't going to be accessing the OS drive much, this should not be a problem. If the drive were over 2 TB, and you were using bios instead of EFI, that would be a problem as bios can only access 2 TB, but since you are using EFI, you should be good.
Given the last comment I think I can now guess about the answer: When a motherboard with EFI firmware boots it will try to do some of these things: Load a bootloader as pointed at by previously defined EFI system variables. Optionally boot in legacy mode Failing to find bootable devices, it will scan attached devices and look for an EFI boot loader. ...
Let's start clean to avoid any errors. Use the official Windows DVD/USB Download tool to freshly mount your DVD/.iso onto the USB stick. This will also verify that there are no major integrity errors with the image. This can and will happen, so it's best practice to use the tool. http://wudt.codeplex.com With Windows 7 and the WUDT, use BIOS/Legacy mode ...
Windows 7 doesn't support the new UEFI GOP (Graphics Output Protocol) and requires VGA option ROM (BIOS interrupt 10 (INT 10H)) to boot. Windows 8/10 supports GOP and read the Logo from the UEFI and displays it during boot for a smoother boot. And it seams that your UEFI always turn GOP on and disables VGA when you select UEFI so Win7 can't be installed ...
Short version: It's possible to do as you want, but it may not be the best approach in your situation. Long version: If you want to convert from a BIOS-mode to an EFI-mode boot of Windows, see this blog post. (There are other pages with similar information out there, too.) Note, however, that this page was written with the assumption that you just want to ...
Windows 10 (and older) will happily recognise existing disks with the MBR partitioning scheme. You can use a GPT disk to boot from and data disks, external drivers, pendrives and whatever else I forgot to mention with MBR's on them and they will just work.
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