Can some1 help me out pleaze ?

[]UBC[Hondekop]

Hello,

since i reinstalled my OS again, i got some mayor problems with starting up my games like :

Starcraft 2
Modern warfare 2
Black ops
Crysis 2
and ofc Quake wars..

My current OS is XP before i installed it was win 7 ( no problems with it) after the error message of Illegal stuff ( you know)

Id like to know something about how do i get a good version without paying... Cause win7 is to expensive to buy with a wife and 2 kids running crazy in here...

So pleaze help me out

Gr

Honde