Is my cursor wondering off to the top left hand corner all by itself?
This use to happen when I was using a wireless mouse and kepboard when the batteries needed changing. I'm actually using the plug in mouse at the moment so is there another reason for it?
I'm still using the wireless keyboard and have changed the batteries just in case...
as chelle said take it out of the hard drive and turn off computer itself - switch it off at the plug - give yourself 10-15 minutes and put the plug in and turn on computer - that usually works for me always