Hmm, we still can't reproduce the problem... and believe us, we've tried!
Your HJT log shows you've got/had some viruses
O4 - HKLM\..\RunServices: [Windows Ocx Service] winocx.exe
http://www.google.com/search?q=winocx.exe
http://www.sophos.com/virusinfo/anal...32rbotaqj.html
O23 - Service: Service Hosts (ServiceHost) - Unknown owner - C:\WINDOWS\shost.exe (file missing)
http://castlecops.com/o23list-1221.html
http://www.sophos.com/virusinfo/anal...32rbotaxg.html