So I'm a little stumped. I have a AT&T Treo 650 that I'm syncing with an XP desktop. Frequently I'm getting a "HotSync cannot open Com4. Will open when available."

And I also getting a message saying UBS device not recognized.

What could be causing it? How would I see what is using Com4 instead of my Treo. How can I fix this? Is Vista any better?

Any thoughs would be much appreciated.

Thanks in advance.