Some form of Malware. You can't delete the DLLs because Windows is using them. No spyware scanners get rid of it. It changes its filename(s) every 20 minutes and it makes explorer.exe crash every half hour or so, fucks up my taskbar and sometimes Windows 2000 doesn't let me log on. Plus there are only very sketchy ways of fixing this, most of which include editing the registry. Yay.