There seem to be many bugs in Windows 7 - despite their advertisements to the contrary. Of course, sometimes the bug is in the application software. Or it can be viruses, etc. I had Microsoft Outlook quit responding twice tonight -- and I had "repaired" it just a couple of days ago. I also had Microsoft Money quit responding tonight. My keyboard response is slow at times. Many people have problems with Internet Explorer 8 not linking to other sites. So don't assume it is FTM. Try to document when it happens. Try rebooting. Do you have a good virus checker?
Good luck.