After the startup i can move the mouse but when I try to open or run something it freezes. But it doesn't happen all the time,sometimes i can work on it immediately after startup. It started maybe 2 months ago,and after that I reinstalled windows twice but that didn't help.
Model is HP g6 2301sm, and windows 7 x64 are installed on it. I bought it last July and it worked well untill January.