And just to add more data points to this discussion: I have two copies of FTW 16, one on an older XP machine and one on a Vista SP2 machine. Both of them ran into the freeze on search problem at the same time and neither was solved with the deletion of temp files. Both machines are set for automatic updates to Windows as they are pushed out by Microsoft. I suspect it was one of these updates or an update to Explorer 9 or Firefox 4 that may have caused the problem we are experiences. Let's hope someone with lots of insight can come up with a solution.