Your operating system is not compatible

[delt664]

"Your Operating System is not compatible. Shattered Horizon requires Windows Vista or Windows 7"

Uhhhhh...

C:\Users\Erix>systeminfo

Host Name: RAWR
OS Name: Microsoftr Windows VistaT Ultimate
OS Version: 6.0.6002 Service Pack 2 Build 6002
OS Manufacturer: Microsoft Corporation
OS Configuration: Standalone Workstation
OS Build Type: Multiprocessor Free

Yep, definitely did not get drunk and install a different OS last night.

[delt664]

After relaunching a few times, it worked. Perhaps this is just a nuisance error message.

[Exetus]

Or you could just rename the OS Check exe file.

See

http://forums.steampowered.com/forums/showpost.php?p=15280247&postcount=10