Sims 3 going Blank then Crashing =(

I own base game sims 3, ambitions and world adventures. Iv downloaded all the other expansions from here. I then downloaded the ultimate fix correctly following the instructions and everything worked fine. I then downloaded Town life when it came out and applied the crack in the download...i dont know if its Town Life that is causing it though....Recently my computer screen is going black then itll flick back on, then black out again and back on after a while...it might do this 3 or 4 times and then the sims will just freeze and crash or ill get blue screen of death.
I dont particularly want to re-install ALL of the games.
I HAVE installed the cracks in all the right places.
is there any way of stopping this???

Please Help =)

Aw man. I wish I knew what to say.. It seems like a video card issue to me, I can't be sure though.. All i can tell you is to check for a driver update for that video card.. I hope someone else knows what to do..

ok ill try it thankyou !

First of all, thanks! I did everything the guide said and still my launcher wouldn't work. I opened the link posted here and did everything and it still freezed. Finally, I decided to do as one person suggested and opened the .exe file directly from program files and it's working great! Thanks again for everything!