I have P4 processor with nvidia card. Now if i don't connect to internet then my computer stays on for as much i can like 4-5 days. But if i plug in the ethernet wire. Do some surfing and leave computer as it is. Then computer fails. I mean The display on screen gets off Looks like something stopping the power supply to Harddisk. But motherboard stays on , FAN is still running , i can eject CD drive as well. But no display on monitor. I have to turn off and then turn on again. I tried formatting windows XP but again same problem