I traced my problem ( I hope! ) to a notepad.exe file, actually 3 of 'em, dated 06-26-04.
Anyhow, if you want to ascertain whether you still have a problem, you should run a Find (Files or Folders) search for *.dll on your C Drive. Once that comes up, put your .dll files in order by the date modified. Look at the recently modified files to see if there are any random meaningless names. (For the record, my last one generated before I finally cleaned things up was Kbddjk.dll) If you find one (and you can just search for the .dll names on Google to see if they're legit - most of them can be found here: www.dll-files.com) then you haven't resolved the problem.
Alternatively, you can download HijackThis and search for suspicious BHOs which are another sign of malware activity. Examining the .dll files is the quickest way to go though.