Hi OldAnalyst,
The only service that I have heard about that is known as WJ as a windows process is a backdoor trojan. If you do have a trojan, make sure your antivirus software is completely up to date.
I use AVG Internet Security full edition. I recommend it.
Link about details on this trojan horse:
http://www.removefakesoftware.com/remove-Win32.Kryptik.WJ.html