This being my first post on this forum let me fill in some blanks. I have had computers since day one. Still have my first one, an Atari. My newest is Win7Pro, 8g RAM, AMD Quad CPU. This system is great. I have had almost zero problems. What I have had was software related and minor. Now it's acting a little strange. After a period of inactivity it will not respond. I use a blank screen saver but no power down or sleep mode. The computer appears to have shut down. Optical mouse is dead, no fans. To restart I have to unplug in back and plug back in. Then the start button operates. Until the unplug I get no response at all. It runs about 45c as I have SETI running on it (searching for ET) at all times. I have massive amount of air for cooling (over 100cfm) I have found nothing odd in the setup and have confirmed power settings. I'm starting to think hardware failure. Any ideas what else to check? It always restarts and runs great.