Could you kindly let me know how to solve frequent rebooting of the XP windows system? It generally happens that my PC stops abbruptly and blue screen appears on the screen. Theraafter there is no command is being exected by the system.
To rule-out an OS/Apps problem - run MSCONFIG and select Diagnostic Mode and reboot. If that solves chances are the problem you've got an OS/App corruption/problem. Run System Restore and choose a restore point prior to the problem and in particular prior to an update or app installation.
Otherwise, the 'typical' abrupt shutdown is from a failing PSU.