OK guys before you tell me to use the search I've done everything other people said, clear the cache, reinstall, update drivers etc etc. The thing is, SL worked fine today on this laptop, but all the textures were purple so I updated my graphic driver and after updating adn restarting PC the viewer started crashing after ''initializying VPS'' thing. I uninstalled, deleted both cache in Local and Roaming, reinstalled multiple time and it still crashes. I really don't know what to do at this point :S Also rolling back drivers from Device Manager is not working, the option is not englighed :S Also here's my system Window 7 home Premium (64 bit) Gateway (Nodeml NV59) Intel(R) Core(TM) i3 CPU Dual 2.13ghz 4GB ram ATI Mobility Radeon HD 5650