I turned my computer on this morning and discovered to my dismay that ALL the text I could see after startup was in wingdings text (or something similar). I was using internet explorer last night for some light browsing of random stuff yesterday so I suspect a virus of some kind. I was able to load and run AVG and Spybot S&D although I couldn't actually read the results.
I have no idea what happened but I was able to do a reinstall of Windows 7 Ultimate.
I only post this so that you can start researching a fix and stop this from happening to anyone else.
Thanks,
Kevin