A la XKCD.... (Score 1)

Fire up a bunch of unpatched Windows virtual machines without virus scanners to seek out and run a bunch of random .exe files from BitTorrent. Another set of VMs aren't downloading but are wide open. Reboot everything at random intervals around 10 minutes. See how long it takes to make a system unbootable. It should take you just a few hours to set up and provide days of enjoyment.