Pls Nairaland people,my desktop system goes off whenever am installing a new software or it detected a new harware,i saw a topic like that but not the same thing,my system is not infected with any virus,i have up to date Norton antivirus,firewalled sysytem,so it's not virus,and i just finished formatting and re- installation on the sysytem some days back,so it most have been a setting problem or so,please if anybody knows anything i can do to it,kindly forward it to the forum,even if i put my flash it will go off straight, and start up again.
will appreciate your reply.

thank you,i'd fixed it,i had to disconnect all hardwares i just installed and re-install them properly,and everything is working fine now.thank you