Ok so I've been working with this old computer putting on Win7 on it and at one point I had it on with everything working. However i had installed Win7 on a noisy HD and so the person I was fixing it up for wanted me to switch it out, so I swapped the drives and reinstalled Win7. Now when left sitting for a long period of time(about a few hours) it will turn off the display. The power light on the case remains on but the Monitor light turns orange. Once that happens no mouse or keyboard input will wake it, nor pushing the power button once. The only thing that fixes it is restarting the computer. I made sure Sleep Mode and Turn off the display were set to never and even disabled Hybrid Sleep mode. I've tried 2 different set of graphics card drivers and both have the problem. I have a Nvidia Geforce FX 5500. Any help with this issue would be appreciated. I did get an Event ID 4101 and 4001 error in the event logs so that might have to do with it. The last idea I have is disabling the screensaver so we will see how that goes.