Salut Toni,

Déjà met à jour ton Windows en passant jusqu'au sp2
< demarrer, tous les programmes, windows update(en haut)

Puis tu peux fixer ceci:

R3 - Default URLSearchHook is missing
O2 - BHO: DownloadRedirect Class - {00000000-6CB0-410C-8C3D-8FA8D2011D0A} - C:\Program Files\iMesh\iMesh5\iMeshBHO.dll
O2 - BHO: iMeshBar BHO - {5345A7A1-805A-4923-B505-86B2FEBA3FE0} - C:\Program Files\iMeshBar\bar\1.bin\IMESHBAR.DLL
O3 - Toolbar: iMeshBar - {5345A7A9-805A-4923-B505-86B2FEBA3FE0} - C:\Program Files\iMeshBar\bar\1.bin\IMESHBAR.DLL
O4 - HKLM\..\Run: [Microsoft Security Panagers] aoubkgvcw.exe
O4 - HKLM\..\RunServices: [Microsoft Security Panagers] aoubkgvcw.exe
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL