LMAO. I got a similar call two weeks ago. Since I didn't have a VM ready to go at the moment to do similar thing I just played along with him for a little while. He told me to go to some random website and scan it for viruses. Obvious motherfucker. I just said that it finished scanning my system and no viruses were returned. He was confused by this because bullshit scanners like that always bring up shit that isn't there as threats. Then I told him that I was a Mac user and he was further confused (probably knew enough to know that exe don't' run in OSX without crossover). Then I laughed and said: "go get a real job you dumbass." Hung Up. Didn't want to spend anymore time on the phone with him. He never called back.
What you should have done is placed gay gifs in the pictures folder and rename them as like "naked girlfriend" or some shit like that lol.