I tried running Lavasoft's Ad-Aware Free, as suggested here. I ran it quite a few times and it removed objects, but I still have the problem.
Here's my log from Hijackthis, and below is my uninstall list.
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:39:48 PM, on 12/20/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16945)
Boot mode: Normal
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:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\agrsmsvc.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\WIDCOMM\Bluetooth Software\bin\btwdins.exe
c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorsvw.exe
C:\Program Files\Common Files\InterVideo\RegMgr\iviRegMgr.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\WINDOWS\system32\SearchIndexer.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\WINDOWS\AGRSMMSG.exe
C:\WINDOWS\system32\igfxtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\system32\igfxpers.exe
C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\WINDOWS\System32\regsvr32.exe
C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\Program Files\Messenger\msmsgs.exe
C:\WINDOWS\system32\igfxsrvc.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Program Files\Windows Desktop Search\WindowsSearch.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\Main\Local Settings\Application Data\Google\Update\1.2.183.13\GoogleCrashHandler.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\PROGRA~1\WIDCOMM\BLUETO~1\BTSTAC~1.EXE
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe
C:\Documents and Settings\Main\My Documents\Downloads\hijackthis.exe
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: MessengerUpdate - {5948A52A-BA3A-49A8-BCAF-D578502BDA9D} - C:\Documents and Settings\Main\Application Data\Messenger\Drivers\MsgUpdate.dll
O2 - BHO: gooochi browser enhancer - {6214AC49-B667-BDF6-6FA8-065627747F9A} - C:\WINDOWS\system32\ncpoeuyuxnvqpvwsd.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.4.4525.1752\swg.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [SoundMAX] C:\Program Files\Analog Devices\SoundMAX\Smax4.exe /tray
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [WatchDog] C:\Program Files\InterVideo\DVD Check\DVDCheck.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [Persistence] C:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [jinpvczjvrtolxud] C:\WINDOWS\System32\regsvr32.exe /s "C:\WINDOWS\system32\ncpoeuyuxnvqpvwsd.dll"
O4 - HKCU\..\Run: [swg] "C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe"
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\Main\Local Settings\Application Data\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [IgfxSys] rundll32.exe "C:\Documents and Settings\Main\Application Data\Messenger\Drivers\IgfxSys.dll",StartProtector
O4 - Global Startup: Bluetooth.lnk = ?
O4 - Global Startup: DVD Check.lnk = C:\Program Files\InterVideo\DVD Check\DVDCheck.exe
O4 - Global Startup: Windows Search.lnk = C:\Program Files\Windows Desktop Search\WindowsSearch.exe
O8 - Extra context menu item: Google Sidewiki... - res://C:\Program Files\Google\Google Toolbar\Component\GoogleToolbarDynamic_mui_en_60D6097707281E79.dll/cmsidewiki.html
O8 - Extra context menu item: Send To &Bluetooth - C:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O23 - Service: Agere Modem Call Progress Audio (AgereModemAudio) - Agere Systems - C:\WINDOWS\system32\agrsmsvc.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Bonjour Service - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Program Files\WIDCOMM\Bluetooth Software\bin\btwdins.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: IviRegMgr - InterVideo - C:\Program Files\Common Files\InterVideo\RegMgr\iviRegMgr.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
--
End of file - 7491 bytes
Uninstall list
Ad-Aware
Ad-Aware
Adobe Flash Player 10 ActiveX
Adobe Flash Player 10 Plugin
Adobe Reader 9.2
Agere Systems HDA Modem
Apple Application Support
Apple Mobile Device Support
Apple Software Update
AuthenTec Fingerprint Sensor Minimum Install
Bonjour
Broadcom NetXtreme Ethernet Controller
Google Toolbar for Internet Explorer
Google Toolbar for Internet Explorer
HijackThis 2.0.2
Hotfix for Microsoft .NET Framework 3.5 SP1 (KB953595)
Hotfix for Microsoft .NET Framework 3.5 SP1 (KB958484)
Hotfix for Windows Media Format 11 SDK (KB929399)
Hotfix for Windows Media Player 11 (KB939683)
Hotfix for Windows XP (KB915800-v4)
Hotfix for Windows XP (KB952287)
Hotfix for Windows XP (KB961118)
Hotfix for Windows XP (KB976098-v2)
HP Integrated Module with Bluetooth wireless technology
Intel(R) Graphics Media Accelerator Driver
InterVideo DVD Check
InterVideo WinDVD
iTunes
Java(TM) 6 Update 17
Microsoft .NET Framework 1.1
Microsoft .NET Framework 1.1
Microsoft .NET Framework 2.0 Service Pack 2
Microsoft .NET Framework 3.0 Service Pack 2
Microsoft .NET Framework 3.5 SP1
Microsoft .NET Framework 3.5 SP1
Microsoft Base Smart Card Cryptographic Service Provider Package
Microsoft Compression Client Pack 1.0 for Windows XP
Microsoft Internationalized Domain Names Mitigation APIs
Microsoft National Language Support Downlevel APIs
Microsoft User-Mode Driver Framework Feature Pack 1.0
Mozilla Firefox (3.5.6)
MSN
PCFriendly
QuickTime
RON Too1 Gooochi
Security Update for Windows Internet Explorer 7 (KB938127-v2)
Security Update for Windows Internet Explorer 7 (KB976325)
Security Update for Windows Media Player (KB952069)
Security Update for Windows Media Player (KB954155)
Security Update for Windows Media Player (KB968816)
Security Update for Windows Media Player (KB973540)
Security Update for Windows Media Player 11 (KB954154)
Security Update for Windows Search 4 - KB963093
Security Update for Windows XP (KB923561)
Security Update for Windows XP (KB941569)
Security Update for Windows XP (KB946648)
Security Update for Windows XP (KB950762)
Security Update for Windows XP (KB950974)
Security Update for Windows XP (KB951066)
Security Update for Windows XP (KB951376-v2)
Security Update for Windows XP (KB951748)
Security Update for Windows XP (KB952004)
Security Update for Windows XP (KB952954)
Security Update for Windows XP (KB954459)
Security Update for Windows XP (KB955069)
Security Update for Windows XP (KB956572)
Security Update for Windows XP (KB956744)
Security Update for Windows XP (KB956802)
Security Update for Windows XP (KB956803)
Security Update for Windows XP (KB956844)
Security Update for Windows XP (KB957097)
Security Update for Windows XP (KB958644)
Security Update for Windows XP (KB958687)
Security Update for Windows XP (KB958869)
Security Update for Windows XP (KB959426)
Security Update for Windows XP (KB960225)
Security Update for Windows XP (KB960803)
Security Update for Windows XP (KB960859)
Security Update for Windows XP (KB961371-v2)
Security Update for Windows XP (KB961501)
Security Update for Windows XP (KB969059)
Security Update for Windows XP (KB969947)
Security Update for Windows XP (KB970238)
Security Update for Windows XP (KB970430)
Security Update for Windows XP (KB971486)
Security Update for Windows XP (KB971557)
Security Update for Windows XP (KB971633)
Security Update for Windows XP (KB971657)
Security Update for Windows XP (KB971961)
Security Update for Windows XP (KB973354)
Security Update for Windows XP (KB973507)
Security Update for Windows XP (KB973525)
Security Update for Windows XP (KB973869)
Security Update for Windows XP (KB973904)
Security Update for Windows XP (KB974112)
Security Update for Windows XP (KB974318)
Security Update for Windows XP (KB974392)
Security Update for Windows XP (KB974571)
Security Update for Windows XP (KB975025)
Security Update for Windows XP (KB975467)
Security Update for Windows XP (KB976325)
SoundMAX
Texas Instruments PCIxx21/x515/xx12 drivers.
Update for Microsoft .NET Framework 3.5 SP1 (KB963707)
Update for Microsoft Windows (KB971513)
Update for Windows XP (KB951978)
Update for Windows XP (KB955759)
Update for Windows XP (KB967715)
Update for Windows XP (KB968389)
Update for Windows XP (KB971737)
Update for Windows XP (KB973687)
Update for Windows XP (KB973815)
Visual C++ 2008 x86 Runtime - (v9.0.30729)
Visual C++ 2008 x86 Runtime - v9.0.30729.01
Windows Internet Explorer 7
Windows Media Format 11 runtime
Windows Media Format 11 runtime
Windows Media Player 11
Windows Media Player 11
Windows Search 4.0
Windows XP Service Pack 3