If I were you, I won’t stop fighting this… I suggest:
-
Disable System Restore on Windows XP: http://support.microsoft.com/default.aspx?scid=kb;[LN];310405
-
Clean your temporary files.
-
Schedule a boot time scanning with avast. Start avast! > Right click the skin > Schedule a boot-time scanning. Select for scanning archives. Boot.
-
Use a-squared, ewido or Spyware Terminator (trojan removers).