Why do computers lockup or stop responding?
During the normal operation of most computer systems, memory and software conflicts can potentially cause your computer system to stop responding. When this occurs you will lose control of the program running and your computer keyboard and mouse may become non-responsive. You can also lose any unsaved information in the program you were working on. If the computer stops responding, the normal procedure to get it working properly is to try to close the offending program. To do this, hold down the CTRL and ALT keys, and then press DELETE (CTRL+ALT+DELETE). If the computer is in a soft lockup, CTRL+ALT+DELETE should bring up the Close Program dialog box. Sometimes it takes several seconds for the Close Program dialog box to appear. If the computer is in a hard lockup, CTRL+ALT+DELETE may not have an affect. The power button must be pressed and held down until the computer turns off. If the Close Program dialog box appears, look through the list and find an item that says “Not responding”
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