I have yahoo protection program, however i installed norton antivirus. now the pc turns off after 30

Hit f8 continually in startup. If you get an option to restore system to previous time accept it. starting up in safe mode should work.

I have yahoo protection program, however i installed norton antivirus. now the pc turns off after 30 secs?antivirus

you shouldn't have two anti virus in your computer at the same time- you might need a system restore if you don't even have the time to unistall it since it reboots by itself

I have yahoo protection program, however i installed norton antivirus. now the pc turns off after 30 secs?computer

uninstall norton antivirus.....