W7 can be restored from "Start", "All Programs", "Accessories", "System Tools", and then "System Restore". All of this can be accomplished right from the GUI. It DOES sound like you've picked up a "bug". I'd also boot windows into Safe mode w/ networking, (F8) before windows starts to load and run Malwarebytes in the safe mode. You WILL need to be connected to the internet via an ethernet cable because wireless won't work in Safe Mode.