I have just the same problem with popup ads frim IE, and I don't use IE at all! It's really annoying and I've tried so much things to get rid of it and nothing... then I came across this post.
I used the program HijackThis and the result is the following:
Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 13:55:02, on 21-07-2010
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
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:\Programas\Microsoft Security Essentials\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Programas\Ficheiros comuns\Apple\Mobile Device Support\AppleMobileDeviceService.exe
C:\Programas\Bonjour\mDNSResponder.exe
C:\Programas\Java\jre6\bin\jqs.exe
C:\Programas\LogMeIn\x86\RaMaint.exe
C:\WINDOWS\system32\igfxtray.exe
C:\Programas\LogMeIn\x86\LogMeIn.exe
C:\Programas\LogMeIn\x86\LMIGuardian.exe
C:\Programas\Ficheiros comuns\Microsoft Shared\VS7DEBUG\mdm.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\hkcmd.exe
C:\Programas\Microsoft Office\Office12\GrooveMonitor.exe
C:\Programas\LogMeIn\x86\LogMeInSystray.exe
C:\Programas\Ficheiros comuns\Real\Update_OB\realsched.exe
C:\Programas\Java\jre6\bin\jusched.exe
C:\Programas\Microsoft Security Essentials\msseces.exe
C:\Programas\LogMeIn\x86\LMIGuardian.exe
C:\Programas\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programas\Microsoft ActiveSync\WCESCOMM.EXE
C:\Programas\SMC\SMCWUSB-G 802.11g Wireless USB 2.0 Adapter\SMCWGUTI.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Programas\Mozilla Firefox\firefox.exe
C:\Programas\Mozilla Firefox\plugin-container.exe
C:\WINDOWS\system32\SNDVOL32.EXE
C:\Documents and Settings\ANA\Definições locais\Application Data\Google\Google Talk Plugin\googletalkplugin.exe
C:\Documents and Settings\ANA\Ambiente de trabalho\HijackThis.exe
C:\Programas\Internet Explorer\IEXPLORE.EXE
C:\WINDOWS\system32\wuauclt.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
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
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://windowsupdate.microsoft.com/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 0.0.0.0:80
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Hiperligações
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Programas\Ficheiros comuns\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Programas\Real\RealPlayer\rpbrowserrecordplugin.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\Programas\Microsoft Office\Office12\GrooveShellExtensions.dll
O2 - BHO: Programa Auxiliar de Início de Sessão do Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programas\Ficheiros comuns\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programas\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Programas\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [GrooveMonitor] "C:\Programas\Microsoft Office\Office12\GrooveMonitor.exe"
O4 - HKLM\..\Run: [LogMeIn GUI] "C:\Programas\LogMeIn\x86\LogMeInSystray.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Programas\Ficheiros comuns\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programas\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [MSSE] "c:\Programas\Microsoft Security Essentials\msseces.exe" -hide -runkey
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programas\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Programas\Ficheiros comuns\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programas\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programas\iTunes\iTunesHelper.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Programas\Microsoft ActiveSync\WCESCOMM.EXE"
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\ANA\Definições locais\Application Data\Google\Update\GoogleUpdate.exe" /c
O4 - HKUS\S-1-5-19\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SERVIÇO LOCAL')
O4 - HKUS\S-1-5-19\..\RunOnce: [nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'SERVIÇO LOCAL')
O4 - HKUS\S-1-5-20\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'Serviço de rede')
O4 - HKUS\S-1-5-18\..\Run: [DWQueuedReporting] "C:\PROGRA~1\FICHEI~1\MICROS~1\DW\dwtrig20.exe" -t (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [DWQueuedReporting] "C:\PROGRA~1\FICHEI~1\MICROS~1\DW\dwtrig20.exe" -t (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'Default user')
O4 - Startup: Dropbox.lnk = C:\Documents and Settings\ANA\Application Data\Dropbox\bin\Dropbox.exe
O4 - Global Startup: SMCWUSB-G 802.11g Wireless USB Utility.lnk = C:\Programas\SMC\SMCWUSB-G 802.11g Wireless USB 2.0 Adapter\SMCWGUTI.exe
O8 - Extra context menu item: E&xportar para o Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: Enviar para o OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: &Enviar para o OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Create Mobile Favorite - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MI3AA1~1\INetRepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MI3AA1~1\INetRepl.dll
O9 - Extra 'Tools' menuitem: Create Mobile Favorite... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MI3AA1~1\INetRepl.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
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:\Programas\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programas\Messenger\msmsgs.exe
O16 - DPF: {5ED80217-570B-4DA9-BF44-BE107C0EC166} (Windows Live Safety Center Base Module) - http://cdn.scan.onecare.live.com/resource/download/scanner/wlscbase6087.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1253171132589
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1253171274863
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\Programas\Microsoft Office\Office12\GrooveSystemServices.dll
O22 - SharedTaskScheduler: Pré-carregador Browseui - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Daemon da cache de categorias dos componentes - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Programas\Ficheiros comuns\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: Serviço de Bonjour (Bonjour Service) - Apple Inc. - C:\Programas\Bonjour\mDNSResponder.exe
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Programas\Ficheiros comuns\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Serviço Google Update (gupdate1ca40822494f550) (gupdate1ca40822494f550) - Google Inc. - C:\Programas\Google\Update\GoogleUpdate.exe
O23 - Service: Serviço iPod (iPod Service) - Apple Inc. - C:\Programas\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programas\Java\jre6\bin\jqs.exe
O23 - Service: LogMeIn Maintenance Service (LMIMaint) - LogMeIn, Inc. - C:\Programas\LogMeIn\x86\RaMaint.exe
O23 - Service: LogMeIn - LogMeIn, Inc. - C:\Programas\LogMeIn\x86\LogMeIn.exe
--
End of file - 9787 bytes
Can you help me, please?