I have a AMD Phenom II 3GHz. 2 GB RAM system running on Windows 7. Off late my PC does not start properly I have to start it at least 7-8 times before it starts. It starts and then shuts down. Every time the time for which the system is up increases. After 7-8 attempts it starts an works fine. I have to give it a min between restarts (USB mouse light goes off). If I try restarting before this time the PC does not start. I am suspecting humidity playing some factor as this issue has started creeping up ever since the rains have started.