Check your Power settings in Control Panel , you can personalize the power settings as when the computer sleeps and when it shuts down , They may be set to shut off in 20 min.
In control panel, power scheme is ALWAYS ON, Turn monitor off: Never. Turn hard disks off: Never. System standby: Never.
This should be enough to keep it on all the time, but as I say, after 20 mins, the video switches itself off - you can set your clock to it - every 20 minutes, if there is no mouse movement or keyboard press. It is not sleeping or hibernating, all the fans and hdd are still spinning, it's just the video that switches off. As with any computer where you had actually set this to happen, once you move the mouse or press a key, the system is instantly ready again, so something(i suspect the BIOS) is bypassing Windoze and turning off the screen anyway. Thanks for the suggestion though, but pretty sure that is not where our problem lies. Any other ideas?
AS far as UP dtae your BIOS download it save it to your desk top ( EXE ) , Than go off line , turn off all of the security antivirus firewalls anti spam and anything else that has to do with security , Tahn run your update it should work. IT TAKES TIME.