Hello, gurus. Below is my HijackThis Log, which I am running because nothing else seems to fix the Critical Stop sound which occurs just as my Windows XP SP2 completes my login. This began occurring less than a week ago, and I have removed all changes since then. So I reckon it's got to be hijack related.

I have been wrong before, though.

Logfile of HijackThis v1.99.1
Scan saved at 4:24:06 AM, on 9/6/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Unable to get Internet Explorer version!

Running processes:
C:\WINDOWS\System32\smss.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\spoolsv.exe
C:\WINDOWS\Explorer.EXE
c:\program files\mcafee.com\agent\mcdetect.exe
c:\PROGRA~1\mcafee.com\vso\mcshield.exe
c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
c:\PROGRA~1\mcafee.com\vso\OasClnt.exe
C:\WINDOWS\system32\ctfmon.exe
C:\PROGRA~1\McAfee.com\PERSON~1\MpfService.exe
c:\program files\mcafee.com\vso\mcvsshld.exe
C:\WINDOWS\system32\svchost.exe
c:\program files\mcafee.com\agent\mcagent.exe
c:\progra~1\mcafee.com\vso\mcvsescn.exe
C:\WINDOWS\system32\ezSP_Px.exe
C:\PROGRA~1\mcafee.com\mps\mscifapp.exe
C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
C:\PROGRA~1\McAfee.com\PERSON~1\MpfTray.exe
C:\Program Files\Microsoft IntelliType Pro\itype.exe
D:\Program Files\Mozilla Firefox\firefox.exe
C:\PROGRA~1\McAfee.com\PERSON~1\MpfAgent.exe
D:\Program Files\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.comcast.net/toolbar2.0/search/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.comcast.net/comcast.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.comcast.net/
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.comcast.net/toolbar2.0/search/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: McBrwHelper Class - {227B8AA8-DAF2-4892-BD1D-73F568BCB24E} - c:\program files\mcafee.com\mps\mcbrhlpr.dll
O2 - BHO: McAfee PopupKiller - {3EC8255F-E043-4cae-8B3B-B191550C2A22} - c:\program files\mcafee.com\mps\popupkiller.dll
O2 - BHO: TChkBHO Class - {4D562D3B-A20C-42F3-AF86-739E9CA96855} - C:\WINDOWS\system32\bhbkkq.dll (file missing)
O2 - BHO: Comcast Toolbar - {4E7BD74F-2B8D-469E-93BE-BE2DF4D9AE29} - C:\PROGRA~1\COMCAS~1\COMCAS~1.DLL
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Ipswitch.WsftpBrowserHelper - {601ED020-FB6C-11D3-87D8-0050DA59922B} - (no file)
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - (no file)
O3 - Toolbar: McAfee VirusScan - {BA52B914-B692-46c4-B683-905236F6F655} - c:\progra~1\mcafee.com\vso\mcvsshl.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: Comcast Toolbar - {4E7BD74F-2B8D-469E-93BE-BE2DF4D9AE29} - C:\PROGRA~1\COMCAS~1\COMCAS~1.DLL
O4 - HKLM\..\Run: [ezShieldProtector for Px] C:\WINDOWS\system32\ezSP_Px.exe
O4 - HKLM\..\Run: [VSOCheckTask] "C:\PROGRA~1\McAfee.com\VSO\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [VirusScan Online] C:\Program Files\McAfee.com\VSO\mcvsshld.exe
O4 - HKLM\..\Run: [MCAgentExe] c:\PROGRA~1\mcafee.com\agent\mcagent.exe
O4 - HKLM\..\Run: [MCUpdateExe] C:\PROGRA~1\mcafee.com\agent\McUpdate.exe
O4 - HKLM\..\Run: [MPSExe] c:\PROGRA~1\mcafee.com\mps\mscifapp.exe /embedding
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [OASClnt] C:\Program Files\McAfee.com\VSO\oasclnt.exe
O4 - HKLM\..\Run: [MPFExe] C:\PROGRA~1\McAfee.com\PERSON~1\MpfTray.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [InCD] D:\Program Files\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [itype] "C:\Program Files\Microsoft IntelliType Pro\itype.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Startup: Adobe Reader Speed Launch.lnk = D:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Adobe Reader Speed Launch.lnk = D:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O8 - Extra context menu item: &Google Search - res://c:\program files\google\GoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: Backward Links - res://c:\program files\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Cached Snapshot of Page - res://c:\program files\google\GoogleToolbar2.dll/cmcache.html
O8 - Extra context menu item: E&xport to Microsoft Excel - res://P:\PROGRA~1\OfficeXP\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Similar Pages - res://c:\program files\google\GoogleToolbar2.dll/cmsimilar.html
O8 - Extra context menu item: Translate into English - res://c:\program files\google\GoogleToolbar2.dll/cmtrans.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra button: ComcastHSI - {669B269B-0D4E-41FB-A3D8-FD67CA94F646} - http://www.comcast.net/ (file missing)
O9 - Extra button: Support - {8828075D-D097-4055-AA02-2DBFA9D85E8A} - http://www.comcastsupport.com/ (file missing)
O9 - Extra button: Help - {97809617-3937-4F84-B335-9BB05EF1A8D4} - http://online.comcast.net/help/ (file missing)
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {CAFEEFAC-0014-0001-0002-ABCDEFFEDCBA} (Java Runtime Environment 1.4.1_02) -
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: InCD Helper (InCDsrv) - Nero AG - D:\Program Files\Ahead\InCD\InCDsrv.exe
O23 - Service: InCD Helper (read only) (InCDsrvR) - Nero AG - C:\Program Files\Ahead\InCD\InCDsrv.exe
O23 - Service: iPodService - Apple Computer, Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Macromedia Licensing Service - Unknown owner - C:\Program Files\Common Files\Macromedia Shared\Service\Macromedia Licensing.exe
O23 - Service: McAfee WSC Integration (McDetect.exe) - McAfee, Inc - c:\program files\mcafee.com\agent\mcdetect.exe
O23 - Service: McAfee.com McShield (McShield) - McAfee Inc. - c:\PROGRA~1\mcafee.com\vso\mcshield.exe
O23 - Service: McAfee Task Scheduler (McTskshd.exe) - McAfee, Inc - c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
O23 - Service: McAfee SecurityCenter Update Manager (mcupdmgr.exe) - McAfee, Inc - C:\PROGRA~1\McAfee.com\Agent\mcupdmgr.exe
O23 - Service: McAfee Personal Firewall Service (MpfService) - McAfee Corporation - C:\PROGRA~1\McAfee.com\PERSON~1\MpfService.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\PROGRA~1\COMMON~1\SONYSH~1\AVLib\Sptisrv.exe