Multi OS T520

[shaftalignment]

Hi All,
I am currently trying to get a T520 to run a multi OS (XP X64, WIN 10, and Ubuntu 22), on 3 installed ssds. I have 2 T420s already operating fine this way along with XP 32 bit on WIN 10 thru a Virtual Machine. The T520 does not have any issues with any of the 3 OS, all are installed and all drivers/hardware working. The issue is whenever I boot Windows 10 after Windows XP x64 has been booted, Windows 10 stalls after circle and logo, then screen goes black. A 2nd try immediately and Windows 10 boots normally. This only happens if XP has been booted since the last time Windows 10 was booted. XP and Ubuntu have no issues. Each OS was installed on it's own drive without any other drives in the machine during installation. I use Bios F12 to choose which to boot to. This method has worked fine on my T420s. If anyone knows how to stop XP from corrupting the Windows 10 boot, please help... My next build like this will be a W520.
Thanks,
Max

[RealBlackStuff]

Maybe you have W10 set with "Fast boot/startup"?
Disable that and all should be good.
https://www.windowscentral.com/how-disa ... st-startup

[shaftalignment]

RealBlackStuff,
Thanks, I had to do that to the T420 and get rid of the WIN 10 Boot Manager or it would trash the XP 64 bit boot files. Tried this on the T520, but it didn't help. WIN 10 is not wrecking XP, XP is wrecking WIN 10. Also did the other way around, disabled fast detect on the XP installation. Still not fixed. Also made each disc not accessible to the other discs. This is not how I would like to run, I use a lot of CAD and CAD/CAM software from different eras and like to be able to access the files I create from the different software easily. It didn't work anyway. All operating systems were installed with BIOS in AHCI mode, F6 floppy method to load AHCI in XP. I run XP 32bit in Windows 10 on virtual machine, but XP x64 does not do well in VM. I am stumped on this, I have tried everything I can find so far. So far, unlike when WIN 10 trashed XP on the original attempts on the T420, Windows 10 recovers after a reboot. I am not sure it will forever. Please keep the ideas coming.....
Max

[shaftalignment]

SOLVED! Windows 10 didn't like my nvidia gpu driver. 1st boot used nvidia (bios set to discrete for all 3 OS) Screen went black and stalled. 2nd boot (successful) machine used Intel Graphics. Uninstalled nvidia driver in WIN 10 and Reinstalled NVIDIA driver. Boots fine now
Max