Thanks for responding! I read the info in the link you posted, but I can't seem to find the winsvc.exe file anywhere on my computer. I have searched in the system 32 folder, and many other WINDOWS folders, as well as trying to find it using "search". It's not listed in my "processes", which seems like a good sign.
I have synced this iPod shuffle to this computer before with no issue, and I have not synced it with any other computer. I recently installed updates from AVG. I wonder if it could be a file windows uses to read the shuffle? When I sync my iPod Nano, I have no such issues, though. Can an MP3 player get a virus? Is AVG just being paranoid, so to speak? The AVG alert only pops up when I connect the shuffle.