Just an aside to your situation: I was in a computer class and the instructor had a spy ware program that he used to check on the students to see what they were doing , and he could take over the machines and do whatever. I knew he was looking at me when my cursor suddenly moved to the side of the screen.
Occassionally, my cursor at home does this, and immediately check for spys, bugs and ner-do-wells! I run spy-bot and EZ-Trust AV, plus a firewall, and the stuff still filters thru...I'm looking over your shoulder for some sound avise also.