Merci pour ta réponse et ton aide.
Nous avons installé avast comme antivirus.
J'ai mis du temps pour mettre en application tes conseils car mon ordinateur ne voulait plus démarrer après l'analyse. L'examen rapide bloque systématiquement. J'ai donc utilisé l'examen éclair dont voici le rapport :
Malwarebytes' Anti-Malware 1.51.2.1300
www.malwarebytes.org
Version de la base de données: 8059
Windows 6.0.6002 Service Pack 2
Internet Explorer 9.0.8112.16421
01/11/2011 11:31:39
mbam-log-2011-11-01 (11-31-39).txt
Type d'examen: Examen éclair
Elément(s) analysé(s): 126832
Temps écoulé: 1 minute(s), 34 seconde(s)
Processus mémoire infecté(s): 0
Module(s) mémoire infecté(s): 0
Clé(s) du Registre infectée(s): 22
Valeur(s) du Registre infectée(s): 2
Elément(s) de données du Registre infecté(s): 0
Dossier(s) infecté(s): 3
Fichier(s) infecté(s): 3
Processus mémoire infecté(s):
(Aucun élément nuisible détecté)
Module(s) mémoire infecté(s):
(Aucun élément nuisible détecté)
Clé(s) du Registre infectée(s):
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\QuestScan Service (Adware.Agent.Gen) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.HbAx (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.HbAx.1 (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.HbInfoBand (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.HbInfoBand.1 (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.IEButton (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.IEButton.1 (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.IEButtonA (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.IEButtonA.1 (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.RprtCtrl (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\ShoppingReport2.RprtCtrl.1 (Adware.ShopperReports) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Software\ShoppingReport2 (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\ShoppingReport2 (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ShoppingReport2 (Adware.Hotbar) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\QUESTSCAN (Adware.QuestScan) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\QUESTSCAN (Adware.QuestScan) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{258C9770-1713-4021-8D7E-1F184A2BD754} (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{258C9770-1713-4021-8D7E-1F184A2BD754} (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\TypeLib\{F244A744-534D-4A46-855F-C0C7E9F27DAA} (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{030C9927-10FC-4169-97A2-55BECD5D88D8} (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Settings\{258C9770-1713-4021-8D7E-1F184A2BD754} (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Stats\{258C9770-1713-4021-8D7E-1F184A2BD754} (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
Valeur(s) du Registre infectée(s):
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\QuestScan\DisplayName (Adware.QuestScan) -> Value: DisplayName -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\QuestScan\DllPath (Adware.QuestScan) -> Value: DllPath -> Quarantined and deleted successfully.
Elément(s) de données du Registre infecté(s):
(Aucun élément nuisible détecté)
Dossier(s) infecté(s):
c:\program files\shoppingreport2 (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
c:\program files\shoppingreport2\Bin (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
c:\program files\shoppingreport2\Bin\2.7.34 (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
Fichier(s) infecté(s):
c:\programdata\questscan\questscan129.exe (Adware.Agent.Gen) -> Quarantined and deleted successfully.
c:\program files\questscan\questscan.exe (Adware.QuestScan) -> Quarantined and deleted successfully.
c:\program files\shoppingreport2\Uninst.exe (Adware.ShoppingReport2) -> Quarantined and deleted successfully.
Encore merci pour ton aide
sgtnono