I was very interested to read of the problems when trying to save or edit a source.I have recently moved to Windows XP and get the same effect.It occurs with both Generations 8.0 and 8.5. I first thought that it was an interaction with a start-up program, but after disabling them all, it still remains. It only seems to affect free-form sources. I wonder if is something to do with the latest raft of Microsoft updates?It will be interesting to see if anyone else gets the problem. Fortunately I have a dual boot system so I go back to Windows 98 when I want to create a new source - a bit messy but it works!