when i turn on the mains from where my pc is connected to the processorc fan turns on and the HDD light comes on, wot does that mean? it didnt use to do that

do u mean when u plug in the computer plugs into the socket?... ur computer turns on?

not really, the computer has aready been connected to a socket. but i turn the socket off at night because my monitor makes a strange noise lol. but when i turn on the power from the socket i think the processor fan spins round slowly and the HDD is actived because the orange light comes on and i can hear it, but this only lasts for about 10 secs then it stops. So some how my computer is half on when i turn on the power from the mains. do u why it does this or wot i should do? thanks