Hi, new guy here. I've enjoyed looking around - lots of knowledge on this board. The problem I have is; It seems like it started after installing dvd burner, then I ended up reformatting after virus' were detected. The machine is restarting randomly sometimes and also while using the dvd burner. I've lost several disks so, I quit using it for now. I've replaced the cpu fan and heatsink because the fan was not working properly and sometimes I had to actually start the fan moving at startup. Replacement did not make a differance. Now I'm stumped at what to do next. Maybe replace the 420w power supply? I notice the +12v varies to 10.18v, all other voltages seem ok. Any guidance will be appreciated.