Crashing during playing

I recently installed games on my PC and for some reasons Vista crashes and restarts. It can be after 5 min or after 60 min. of playing. It only happens while playing games not surfing or anything else.

When restarted I got a msg box that said something with BlueScreen error and a lot of other stuff.

I started with checking for dust but not much there, but now its really clean.

Some recommended me to run the reg clean bundle so I bought the pro bundle and ran all the programs, did the updates etc etc. But no succes, the only change is that now I dont get the error msg box after the restart.

So now I'm here looking for help

I ran the SF program but there was one part that it apparantly couldnt run, so I just pressed continue.

Hope someone can help me.