Windows 10: One system, two OSs, changing BIOS to EUFI booting...

On my system, there are two Windows 10 Pro 64-bit installed; no dual-boot, that's managed by "F12" during BIOS load:





The plan is to change the BIOS booting to EUFI for both Windows 10 installation, based on NavyLCDR post, but couple of questions prior to proceeding.

Can both of the systems be changed from within one active OS, after creating the FAT32 partition on both with different drive letters? And after that just run:

Code: bcdboot C:\Windows /s V: /f ALL bcdboot E:\Windows /s W: /f ALL[/quote]
TIA...

:)

 

Asus only boots into EUFI BIOS screen after win 10 upgrade.


I have an Asus AiO ET2221A upgraded from Win8.1 to 10 3 months ago, and today only boots into the EUFI BIOS screen. There are no errors reported on Boot, just the BIOS screen

I was able to run Memtest from a DVD - fine, but couldn't boot into Hirens on USB or DVD. The BIOS does list the hdd partitions, plus I can search the hdd partitions/folders from within BIOS(!!); not that it helps.

I did remove and run Chkldsk on anther PC which showed/replaced several errors (20 bad sectors). I also loaded the latest BIOS download onto the hdd which in theory I can access from within BIOS. However after replacing the hdd after the chkdsk repair, it still wouldn't boot into Windows.

I am surprised as I would expect the BIOS to report it can't find the Windows (if it is the disk), rather than stick in BIOS without any diagnostics.

So I am still in a quandary as to whether this is a BIOS issue and/or a HDD issue, plus by upgrading from 8.1 to 10 the latter usually corrupts the Windows (8.1) recovery partition.

I am no expert on EUFI BIOS, but I understand that the Windows License is stored within the BIOS. If I try and re-install the BIOS is the license retained? And from that could I also re-install WIndows 10 from a download?

Thanks

Edit: since posting I have got the system to boot into Hirens, but as soon as XP starts to load it turns off the USB mouse/keyboard so becomes useless. All I did was to switch off secure boot, and specify the boot order, either optical or USB. Progress but not sure what it tells me, or how I can get the usb mouse to work in Hirens in a eufi system (not had this issue before with non-eufi systems).

Do you think this does, however point to a hdd issue?

 

Changing BIOS

Hi Phil

Do you now have another internal hard drive that you want to boot from or are you actually trying to boot from that external HDD?

When you boot your system into BIOS, on the boot order list can you not move the drive you want to boot from to the top of the boot order List?

If you have UEFI BIOS - you may need to temporarily disable Secure Boot to change the boot order, then restore Secure Boot . ..

 

Changing boot hdd

I downloaded PartitionMagic8.0, but the partition i want to make is not bootable.
So the system boots from the old, loud hdd, and when i unplug the old, it doesnt boot.
Any advice or suggestions how to change boot hdd without reinstalling Winxp?