I asked my good friend and virus guru Dr. Igor Muttik about this one. He told me that this is the W97M/Opey virus, which has set Application.UserName = "Another infected of Angel virus."
AV software does not usually restore the registry keys, as there is no way to find out what they were before the infection occurred.
Then, use regedit to search in the registry for the string you wish to change back to something which makes more sense to you.
For more information on this topic, visit these other searchSecurity resources:
Best Web Links: Malware
Virus Prevention Tip: Cleaning out a virus infection
This was first published in February 2002