Here's a copy of the HijackThis log file
Logfile of HijackThis v1.99.1
Scan saved at 9:18:14 PM, on 7/6/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\Program Files\Spyware Doctor\sdhelp.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Spyware Doctor\swdoctor.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\svchost.exe
C:\Documents and Settings\Administrator\My Documents\downloads\cleaner\HijackThis.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar =
Bing:
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Int ernet Settings,ProxyServer = http=localhost:7171
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,
O2 - BHO: (no name) - AutorunsDisabled - (no file)
O2 - BHO: (no name) - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: PCTools Site Guard - {5C8B2A36-3DB1-42A4-A3CB-D426709BBFEB} - C:\PROGRA~1\SPYWAR~1\tools\iesdsg.dll
O2 - BHO: PCTools Browser Monitor - {B56A7D7D-6927-48C8-A975-17DF180C71AC} - C:\PROGRA~1\SPYWAR~1\tools\iesdpb.dll
O2 - BHO: (no name) - {E3215F20-3212-11D6-9F8B-00D0B743919D} - (no file)
O4 - HKCU\.. \Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\.. \Run: [Spyware Doctor] "C:\Program Files\Spyware Doctor\swdoctor.exe" /Q
O9 - Extra button: Spyware Doctor - {2D663D1A-8670-49D9-A1A5-4C56B4E14E84} - C:\PROGRA~1\SPYWAR~1\tools\iesdpb.dll
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (Installation Support) - C:\Program Files\Yahoo!\Common\Yinsthelper.dll
O16 - DPF: {5AE58FCF-6F6A-49B2-B064-02492C66E3F4} (MUCatalogWebControl Class) -
http://catalog.update.microsoft.com/...?1219538942484
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) -
http://www.update.microsoft.com/wind...?1219434899250
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) -
http://www.update.microsoft.com/micr...?1219540279421
O16 - DPF: {9732FB42-C321-11D1-836F-00A0C993F125} (mhLabel Class) -
http://www.pcpitstop.com/mhLbl.cab
O20 - AppInit_DLLs: ms32clod.dll
O20 - Winlogon Notify: dimsntfy - %SystemRoot%\System32\dimsntfy.dll (file missing)
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: McAfee Real-time Scanner (McShield) - Unknown owner - C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe (file missing)
O23 - Service: McAfee SystemGuards (McSysmon) - Unknown owner - C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe (file missing)
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: PC Tools Spyware Doctor (SDhelper) - PC Tools Research Pty Ltd - C:\Program Files\Spyware Doctor\sdhelp.exe
Also looking at Windows Task Manager again, the process that's running is iexplore.exe, but when this is running, I sometimes here a commercial coming from my speakers and when I kill the process, the commercial stops. I haven't heard the commercials in the last three days, therefore, I'm a little less concerned. I am currently running Malwarebytes' Anti-Malware, and will let you know the outcome as soon as it is complete.