Do you mean it shuts down compeltely or it reboots ? You have to give more info than that and also your OS..so letst start here with these steps so it can be isolated between a harware or software problem..
First do these stepsGuidelines for Posting in This Forum, READ THIS FIRST PLEASEhttp://forum.gladiator-antivirus.com/index...showtopic=10517Then post your hijackthis log Many of the infections we see lately can be removed via Add/Remove programs, or they at least have an entry there. HiJackThis has the ability to get a list of the programs that have a registered uninstaller.
Please create a list of programs that can be removed using Add/Remove Programs
Start HiJackThis
Press 'Config'
Press 'Misc Tools'
Press 'Open Uninstall Manager'
Press 'Save List'
Save the log to a convenient location
Copy the log and post its contents in this thread
If you do not make that your next step before you even start cleaning your PC with Hijackthis or many of the other Antispyware products you could lose your internet connection and/or have a harder time cleaning off those particular items.