Pop up dirstadsolution

Bonjour, quand j'ouvre wanadoo, j'ai une page pop up qui s'ouvre avec le nom de ad firstadsolution. J'ai telechargé hijackthis et voici le rapport qu'il me donne mais je ne sais pas quoi cocher. merci de votre aide.
Logfile of HijackThis v1.99.1
Scan saved at 18:26:31, on 12/02/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\system32\spoolsv.exe
D:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
D:\Program Files\Alwil Software\Avast4\ashServ.exe
D:\WINDOWS\System32\FTRTSVC.exe
D:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
D:\WINDOWS\System32\nvsvc32.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\Explorer.EXE
D:\WINDOWS\system32\NVATray.exe
D:\Program Files\Logitech\Video\LogiTray.exe
D:\WINDOWS\system32\CmWatch.exe
D:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
D:\PROGRA~1\Wanadoo\TaskBarIcon.exe
D:\WINDOWS\System32\LVComsX.exe
D:\Program Files\Logitech\Video\FxSvr2.exe
D:\Program Files\Utilitaire réseau pour SAGEM Wi-Fi 11g USB adapter\WLANUTL.exe
d:\progra~1\intern~1\iexplore.exe
D:\Program Files\Internet Explorer\iexplore.exe
D:\Program Files\Alwil Software\Avast4\ashWebSv.exe
D:\Program Files\Microsoft AntiSpyware\gcasDtServ.exe
D:\Program Files\Microsoft AntiSpyware\gcasServ.exe
D:\Program Files\Messenger\msmsgs.exe
D:\WINDOWS\system32\ctfmon.exe
D:\WINDOWS\system32\wuauclt.exe
D:\WINDOWS\System32\ALERTM~1\ALERTM~1.EXE
D:\Program Files\Wanadoo\Watch.exe
D:\Program Files\Wanadoo\EspaceWanadoo.exe
D:\Program Files\Wanadoo\ComComp.exe
D:\Program Files\Internet Explorer\iexplore.exe
D:\Documents and Settings\parents\Local Settings\Temporary Internet Files\Content.IE5\8JY1W3Q1\HijackThis[1].exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.wanadoo.fr/go/page_recherche/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.wanadoo.fr
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.wanadoo.fr
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Wanadoo
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Search Class - {08C06D61-F1F3-4799-86F8-BE1A89362C85} - D:\PROGRA~1\Wanadoo\SEARCH~1.DLL
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - d:\program files\google\googletoolbar1.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - d:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE NvQTwk,NvCplDaemon initialize
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NVIDIA nForce APU1 Utilities] NVATray.exe
O4 - HKLM\..\Run: [LogitechVideoTray] D:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [CmCardRun] D:\WINDOWS\system32\CmWatch.exe
O4 - HKLM\..\Run: [gcasServ] "D:\Program Files\Microsoft AntiSpyware\gcasServ.exe"
O4 - HKLM\..\Run: [avast!] D:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [WOOWATCH] D:\PROGRA~1\Wanadoo\Watch.exe
O4 - HKLM\..\Run: [WOOTASKBARICON] D:\PROGRA~1\Wanadoo\GestMaj.exe TaskBarIcon.exe
O4 - HKLM\..\Run: [QuickTime Task] "D:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [WOOKIT] D:\PROGRA~1\Wanadoo\Shell.exe appLaunchClientZone.shl|DEFAULT=cnx|PARAM=
O4 - HKCU\..\Run: [ctfmon.exe] D:\WINDOWS\system32\ctfmon.exe
O8 - Extra context menu item: &Traduire à partir de l'anglais - res://D:\Program Files\Google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: E&xport to Microsoft Excel - res://D:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Pages liées - res://D:\Program Files\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://D:\Program Files\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google - res://D:\Program Files\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://D:\Program Files\Google\GoogleToolbar1.dll/cmcache.html
O9 - Extra button: Messager Wanadoo - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\PROGRA~1\WANADO~1\Wanadoo Messager.exe
O9 - Extra 'Tools' menuitem: Messager Wanadoo - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\PROGRA~1\WANADO~1\Wanadoo Messager.exe
O9 - Extra button: Wanadoo - {1462651F-F4BA-4C76-A001-C4284D0FE16E} - http://www.wanadoo.fr (file missing) (HKCU)
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=48835
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1139508157169
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "D:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - D:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - D:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Web Scanner - Unknown owner - D:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: France Telecom Routing Table Service (FTRTSVC) - France Telecom - D:\WINDOWS\System32\FTRTSVC.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - D:\WINDOWS\System32\nvsvc32.exe