Windows 10 crashing while updating Parallels Tools

I´m using the latest version of Parallels v16 with an Windows 10 Pro VM on macOS X 11.6 Big Sur.
Since the last release update of Paralllels two weeks ago, my macOS Keyboard layout isnt´t correctly mapped in the Windows 10 VM. In addition to this drag´ndrop of files between Windows 10 and macOS X isn´t working anymore.
So I tried to update the Parallels tools for many times, but every time after 67% the installation crashes the Windows 10 machine showing "System thread exception not handled" (s.a. Screenshot).
I found and followed allready the tips from this link
https://kb.parallels.com/8969
but the symptoms are the same. Blue Screen - Crash of Windows 10.
Any idea?