Good lord, am I the only person in the world who knows how to use Google?

http://www.djkaty.com/wmicorruption for help with possible WMI corruption.

Data Execution Prevention is usually linked to a specific program. It's a feature of Windows. You might have picked up a virus or worm, or it might be related to WMI corruption.

http://en.wikipedia.org/wiki/Data_Execution_Prevention

If a restart doesn't clear things up, the next easiest thing might be to do a System Restore to a point before the last automatic Windows Update (assuming you have automatic updates set).