All mouse interaction shows spinning ceiling.. - ME TOO!

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Go here:

http://www.ehow.com/how_7695843_can-spin...games.html

Try instructions 1 ans 2. I don't think something else can be done here. Maybe we could analyze the mouses and find out what causes the problem at least.

No, dont work. I tried this: http://www.technize.com/use-mouse-as-key...-as-mouse/ - same problem. I think its not a mouse problem - in 2010 i tried the demo and it works, it is possible to install an older patch-version over the new 1.2 in the steam-version?