Cherche.us et search-web.net

Bonjour,

j'ai lancé malwarebytes, réinstallé java, rien n'y fait, j'ai toujours ces deux moteurs de recherche en page de démarrage de mes trois navigateurs. voici mon rapport hijackthis.
une solution?

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:38:28, on 18/05/2011
Platform: Unknown Windows (WinNT 6.01.3504)
MSIE: Internet Explorer v9.00 (9.00.8112.16421)
Boot mode: Normal

Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\Program Files\HP\HP Software Update\hpwuschd2.exe
C:\Windows\System32\PrintDisp.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\RocketDock\RocketDock.exe
C:\Program Files\DAEMON Tools Lite\DTLite.exe
C:\Windows\system32\taskhost.exe
C:\Windows\system32\taskeng.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Mozilla Firefox\plugin-container.exe
C:\Users\Christopher\Downloads\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer,SearchURL = http://www.search-web.net/keyword/%s
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.search-web.net
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://www.search-web.net/keyword/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.search-web.net
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.search-web.net
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://fr.msn.com/
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page_bak = http://www.search-web.net
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: (no name) - {d40b90b4-d3b1-4d6b-a5d7-dc041c1b76c0} - (no file)
O1 - Hosts: ::1 localhost
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Windows Live ID Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [Malwarebytes' Anti-Malware (reboot)] "C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe" /runcleanupscript
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\Hp\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [PrintDisp] C:\Windows\system32\PrintDisp.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKCU\..\Run: [RocketDock] "C:\Program Files\RocketDock\RocketDock.exe"
O4 - HKCU\..\Run: [Google Update] "C:\Users\Christopher\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Program Files\DAEMON Tools Lite\DTLite.exe" -autorun
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Recherche avec search-web - C:\Users\Christopher\scriptjava.html
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.DLL
O10 - Unknown file in Winsock LSP: c:\program files\common files\microsoft shared\windows live\wlidnsp.dll
O10 - Unknown file in Winsock LSP: c:\program files\common files\microsoft shared\windows live\wlidnsp.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O13 - Gopher Prefix:
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O23 - Service: AMD External Events Utility - AMD - C:\Windows\system32\atiesrxx.exe
O23 - Service: Avira AntiVir Planificateur (AntiVirSchedulerService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Printer Control - ActMask Co.,Ltd - HTTP://WWW.ALL2PDF.COM - C:\Windows\system32\PrintCtrl.exe