Welcome to KORG!

By "crashes", do you mean "blue screen" with a Stop-50?

These are generally related to page faults in unpaged areas, or attempts to access memory not allocated to the application. This can be the result of bad drivers, applications, or other software (such as AV) components.

In less common situations, it could be caused by defective L2 cache, RAM, or even CPU. Hardware issues, however, are rarely specific to a particular application such as Kix - the problem would be more widespread.

Was this DC built or upgraded recently compared to the others?
Are all drivers on this DC the SAME as on the others? (Higher doesn't always mean better!)
Are there any hardware differences between these DCs?
Software differences? (apps not on the others, or different versions or windows components.)
Windows patches/hotfixes? Buffer overrun issues can cause this type of error, and many hotfixes have been issued to correct these. Make sure all systems are at the same patch level.

Also - to rule out a corrupted version of Kix - open a command prompt and run
 Code:
\\OtherDC\Netlogon\kix32.exe \\OtherDC\Netlogon\loginscript.kix
- this will run the login process from the other server and either crash or point to a disk corruption on the local DC.

Glenn
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Actually I am a Rocket Scientist! \:D