East Transfer "Access denied"

I'm trying to transfer files from my old XP computer to my new Vista

computer. Midway or near the end of each (50+ hours) transfer, I keep

getting a

"... Failed: \HKCU\Software\Microsoft\Windows\CurrentVersion\Internet

Settings\5.0\user Agent\Post Platform... Access Denied" message.

Any idea what's wrong with my old XP settings and how to fix this?

Thanks,

YC