was using my laptop today when the cursor suddenly stopped moving. I left it alone for a while and saw that pretty soon the cursor began moving by itself, albeit jaggedly. thanks to the problem, I cannot use my computer as I cannot get the cursor to go where I'd like it to. This has never happened before, so I'm wondering if it's been hacked ( discovered my firewall was off today as well). Any suggestions as to how to fix the problem and what the cause of the problem is?