Windows 11 keeps crashing randomly on multiple machines

MartinW16

Bit poster
Since a few weeks ago we have multiple Windows 11 installations randomly crashing and rebooting.
All Macs are older iMac models with Intel CPU. We're running v26.1.2 (57293) on Tahoe.

I attempted to do a repair install of Windows, but that throws an error during the last step (something went wrong...) and aborts.

What can we do to find the cause of the problem and hopefully fix this?
 
Solution
Support told us to switch from Parallels hypervisor to Apple's. I can't tell yet if that helps.

1. Shutdown any running virtual machine (Click on the "Actions" menu on top of the Mac menu bar > "Shutdown" OR if the virtual machine is suspended > Resume it first then shut it down)
2. Right-click on the Parallels icon in the Dock > Control Center > Right-click on your Windows 11 virtual machine > Configure
3. Select the "Hardware" tab > CPU & Memory > Advanced > Click on "Parallels" Hypervisor and change it to "Apple" > Close the Configuration Window
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