Windows 10: UEFI VM in non UEFI machine - Yes its possible

Hi there

Remember if you are using VMWARE you can try out a UEFI guest even if your HOST doesn't support it.

In the configuration file set the following

firmware="efi"

That's it !!!

Note you must do this BEFORE installing the VM - you can't change it afterwards.

Afraid VBOX users are out of luck (currently) on this one. Takes default from HOST Bios.

Cheers
jimbo

:)

 

"defaultuser0" created on clean install of Anniversary Update

It is actually a bad idea to install in UEFI and then change BIOS settings to legacy and vice-versa. If you decide to go with UEFI (which is a good idea), stay with it.

It is true that on older machines UEFI support has issues and it is better to go with legacy. But on newer machines UEFI is the best way to go (for boot security and performance).

If you set BIOS to UEFI and you cannot boot from the flash drive, then the flash drive was created incorrectly. Always go with the media tool offered by Microsoft when creating the bootable USB drive.

If the BIOS is set to UEFI but the install fails, there a 2 possibilities: either the boot media is faulty or UEFI support BIOS is problematic (very possible in older systems, when UEFI was in its early days). In this case, it is better to disable UEFI and
install in legacy mode.

 

Windows 10 problem that happens when only when run in UEFI mode.

It's slow in general in UEFI , its boots slow and once in windows its slow, running programs etc. It's a Lenovo H430 desktop , I have contacted Lenovo about it, and they won't help it. when it was a windows 8 machine it ran fine with Uefi, But with windows
10 it gives the issues that I describe.

 

In Hyper-V:

Step 1, select Generation 2 vm in new vm wizard:




Step 2, disable Secure Boot in vm settings:




That's it.

*Wink

 

VirtualBox has supported EFI for OSX and Linux guests since version 3.1 (released in 2010) and for Windows Guests running 8.1 and above since version 4.3.20 (released in November 2014).

Windows 10 guests work fine EFI - just tick the enable EFI box