Im guessing that somewhere a long time ago when your PC was running win 95/8 you had this virus and it was not completely removed in that there is / was an entry left in your temp files that just stayed there dormant. For this to ever eventuate now suggests that when you upgraded , you installed win xp straight on top of win95/8. thereby retaining all your settings and files, temps and all.
Either way, by the description i dont think it represents a threat to your system now but you should be the ultimate judge of that. If you have unexplainable behaviour on your pc. If it starts dialling out , if you get re-directed to sites you dont want etc then i suggest you do one last thing to be sure.
http://www.kaspersky.com/remoteviruschk.html
this is kapersky`s on line scan which will be a big download on dial up but if you get through that clean then trust me they have the biggest deepest scan around and you will be clean. As you saw they were the people who reported this in the first place.
good luck 