so recently i have noticed that my cursor every once and a while starts moving around while my hand is totally away from the desk, not even close to the mouse. at first i thought maybe i had a virus and some one is going through my computer but i ran a virus scan many times and nothing was detected. and know i dont know what it is. every time i see it happen i swear some one is trying to hack my computer, but the virus scan never detects any software that could be a virus or a trojan of any kind. my partition is ntfs and i thought that made it a little harder for people to hack there way in like sub7 did on fat32. i dont know what to do and i just about want to flip the power switch really fast every time i see this happen...what do you think this is?