siren

hi guys I know this might just look like a common problem but I have tried everything so solve it.So plz help.. My computer boots up properly but when Windows starts loading I get a siren kind of sound and the system shut downs.It happens in my Windows XP as well as Win Me.It does not happen...

Hi guys, need help badly!!! Recently my Case fan (not Processor fan) had started making a lot of noise,so i disconnected it cleaned it and plugged it back into the motherboard again. However after i did this the Pc started normally only once or twice but after that as soon as i switch on the...