I am having a very annoying issue where I get a blue screen every so often in Windows Vista. Sometimes its after I close out a program, but it seems to happen at any time at least once every 2 days of heavy computer use. The blue screen will post MEMORY_MANAGEMENT and the computer will then completely restart. The last time this happened was about 20 minutes ago when I applied a new screen saver. As soon as I hit the APPLY button I got the blue screen.

Does anyone have any ideas what is causing this or what I can do to solve?