When were you able to shut down the computer?
What changes have been made since then? Can you reverse those changes? eg System Restore?
What are the symptoms of the No Shut Down"?
More info please so we can help you.
computer. I have a Dell Dimesion 8300, Intel Pentium 4 cpu, 300 ghz. 299 grhz, 512 mb of ram. Running WXP home verison 2002, SP2 and lastest critical updates. Nvidia GE Force fX 5200 and creative sb live series 5. I have ZoneAlarm Pro firewall, AVG Free antivirus with the latest definitions, and Sybot Search and Destroy.