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i facing one problem, everytime i boot up windows, the system will pop up a shutdown countdown dialog then will shutdown automatically. i already try run "shutdown -a", it will solve for few days, then problem will come again....any solution?
Which version of Windows XP are you running? Which Service Pack?
To know about this Open Start Menu > Run and type winver and press Enter
Win XP SP1 and older had a security hole, that allowed a remote hacker to shutdown your PC in this manner. You may have to apply latest SP. Some worms like Blaster can cause your system to go on a restart loop like this. You may need to scan your computer for viruses.