After talking to yet another rep, he finally sent me to a knowledge page where one of the steps was a "Hard Reset" of the handheld while connected via the USB cradle/cable. (Why it took six tech reps to get to this page is beyond me!) This is the most drastic troubleshooting technique, BUT IT WORKED! Hope this helps someone else and saves them the hours I wasted.
Have been trying to get my Clie to hotsync with Windows XP. Worked with Sony chat tech support and have installed/reinstalled various downloads without success. Read other posts about Clie hotsync probs but these don't seem to fit. I get the hotsync button in the task bar, but it won't communicate. Windows says there is no driver installed. Tired of getting the same old line from Sony. Any other ideas out there?