Thanks.

Though i also had to start original installer again, cancel it..
(original .msi packet was left to temp folder after cancelling -not deleted automatically as described here)
..and copy edited msi packet into same location in temp folder after deleted original one.

Then i could successfully install M-Audio drivers to my server.

This should be made possible by M-Audio because 1. though most people dont use m-audio products on servers they should not prevent it. M-Audio should not decide it behalf of customers.
2. Srv2008R2 has same core as Win7
3. Hyper-V users have to get hardware working in server first before delegating those to guest machines.. so i actually am trying to use this driver with Win7 -not in the server- it just runs over Hyper-V!

My temp folder has a .exe file instead of a msi or the like. The 3rd party installer creates an install log with the following: Action 12:55:33: LaunchConditions. Evaluating launch conditions
Action start 12:55:33: LaunchConditions.
Affymetrix GeneChip Command Console requires that your computer is running Windows XP with SP2, Windows 2003 Server with SP2, or Windows Vista.
MSI (c) (90:0C) [13:02:12:048]: Product: Affymetrix GeneChip Command Console — Affymetrix GeneChip Command Console requires that your computer is running Windows XP with SP2, Windows 2003 Server with SP2, or Windows Vista.

Action ended 13:02:12: LaunchConditions. Return value 3.
InstallShield 13:02:12: Failed to launch action ‘LaunchConditions’, error is 1603

Any advise?

Thanks,
-Tom