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Salut,

Réinitialise Firefox : https://www.malekal.com/reparer-firefox/?t=36057&start=

ok, tu as aussi deux antivirus, cela ralentit l'ordinateur.
Faudrait choisir entre AVG et Microsoft Security Essentials,

fais ça :

Voici la correction à effectuer avec FRST.
Tu peux t'inspirer de cette note explicative avec des captures d'écran pour t'aider: https://www.malekal.com/tutoriel-farbar-recovery-scan-tool-frst/#fix

Ouvre le bloc-notes : Touche Windows + R, dans le champs executer, tape notepad et OK.
Copie/colle dedans ce qui suit :

Task: {2823BCF0-31DF-4A0A-BB47-057676981351} - System32\Tasks\Microsoft\Windows\Maintenance\SMupdate2 => Rundll32.exe C:\PROGRA~1\COMMON~1\System\SysMenu.dll ,Command701 update2 <==== ATTENTION
Task: {823B5FA8-56B9-4C48-9B31-E2040ABD62FA} - System32\Tasks\VPLWPCWP => C:\Users\Christine\AppData\Roaming\VPLWPCWP.exe <==== ATTENTION
Task: {90C358DB-9084-4A42-A6BF-F318FE7A75F2} - \SPBIW_UpdateTask_Time_333934303335323932302d7837235a576c4a3241345041 No Task File <==== ATTENTION
Task: {96098C06-6449-4E88-98BD-B90A471EB27E} - System32\Tasks\User_Feed_Synchronization-{D18363F1-F769-4808-A22E-DCA541F04624}
Task: {A7AF9EEA-BC15-4890-BEE9-FAEC43AACE8B} - System32\Tasks\RG => C:\Users\Christine\AppData\Roaming\RG.exe <==== ATTENTION
Task: {D0758C78-5C77-45B7-ACD6-3F6D1B557AD0} - System32\Tasks\Microsoft\Windows\Multimedia\SMupdate3 => Rundll32.exe C:\PROGRA~1\COMMON~1\System\SysMenu.dll ,Command701 update3 <==== ATTENTION
Task: {D3BD2823-727E-484C-9E69-5E15C3A1A8EE} - System32\Tasks\YTDownloaderUpd => C:\Program Files (x86)\YTDownloader\updater.exe <==== ATTENTION
Task: {FAA312A8-761C-4060-952B-07A85639FC24} - System32\Tasks\{BE07B160-F2A2-4DF5-9882-B5138F615D92} => Firefox.exe
Task: C:\Windows\Tasks\RG.job => C:\Users\Christine\AppData\Roaming\RG.exe <==== ATTENTION
Task: C:\Windows\Tasks\VPLWPCWP.job => C:\Users\Christine\AppData\Roaming\VPLWPCWP.exe <==== ATTENTION
CHR Extension: (PriiceLess) - C:\Users\Christine\AppData\Local\Google\Chrome\User Data\Default\Extensions\ajmanaknibhondipbchdjlfhlfpalicl [2014-10-23]
HKU\S-1-5-21-2133809458-2915696189-3391681213-1000\...\Run: [YTDownloader] => "C:\Program Files (x86)\YTDownloader\YTDownloader.exe" /boot

Une fois, le texte coller dans le bloc-note.
Menu Fichier puis Enregistrer sous.
A gauche, place toi sur le bureau.
Dans le champs en bas, nom du fichier mets : fixlist.txt
Clic sur Enregistrer - cela va créer un fichier fixlist.txt sur le bureau.

Relance FRST et clic sur le bouton Fix
Selon comment un redémarrage est nécessaire (pas obligatoire).
Un fichier texte apparaît, copie/colle le contenu ici dans un nouveau message.

ok ci dessous le message

Fix result of Farbar Recovery Tool (FRST written by Farbar) (x64) Version: 07-12-2014 02
Ran by Christine at 2014-12-08 12:59:22 Run:1
Running from C:\Users\Christine\Desktop
Loaded Profile: Christine (Available profiles: Christine)
Boot Mode: Normal
==============================================

Content of fixlist:
*****************
Task: {2823BCF0-31DF-4A0A-BB47-057676981351} - System32\Tasks\Microsoft\Windows\Maintenance\SMupdate2 => Rundll32.exe C:\PROGRA~1\COMMON~1\System\SysMenu.dll ,Command701 update2 <==== ATTENTION
Task: {823B5FA8-56B9-4C48-9B31-E2040ABD62FA} - System32\Tasks\VPLWPCWP => C:\Users\Christine\AppData\Roaming\VPLWPCWP.exe <==== ATTENTION
Task: {90C358DB-9084-4A42-A6BF-F318FE7A75F2} - \SPBIW_UpdateTask_Time_333934303335323932302d7837235a576c4a3241345041 No Task File <==== ATTENTION
Task: {96098C06-6449-4E88-98BD-B90A471EB27E} - System32\Tasks\User_Feed_Synchronization-{D18363F1-F769-4808-A22E-DCA541F04624}
Task: {A7AF9EEA-BC15-4890-BEE9-FAEC43AACE8B} - System32\Tasks\RG => C:\Users\Christine\AppData\Roaming\RG.exe <==== ATTENTION
Task: {D0758C78-5C77-45B7-ACD6-3F6D1B557AD0} - System32\Tasks\Microsoft\Windows\Multimedia\SMupdate3 => Rundll32.exe C:\PROGRA~1\COMMON~1\System\SysMenu.dll ,Command701 update3 <==== ATTENTION
Task: {D3BD2823-727E-484C-9E69-5E15C3A1A8EE} - System32\Tasks\YTDownloaderUpd => C:\Program Files (x86)\YTDownloader\updater.exe <==== ATTENTION
Task: {FAA312A8-761C-4060-952B-07A85639FC24} - System32\Tasks\{BE07B160-F2A2-4DF5-9882-B5138F615D92} => Firefox.exe
Task: C:\Windows\Tasks\RG.job => C:\Users\Christine\AppData\Roaming\RG.exe <==== ATTENTION
Task: C:\Windows\Tasks\VPLWPCWP.job => C:\Users\Christine\AppData\Roaming\VPLWPCWP.exe <==== ATTENTION
CHR Extension: (PriiceLess) - C:\Users\Christine\AppData\Local\Google\Chrome\User Data\Default\Extensions\ajmanaknibhondipbchdjlfhlfpalicl [2014-10-23]
HKU\S-1-5-21-2133809458-2915696189-3391681213-1000\...\Run: [YTDownloader] => "C:\Program Files (x86)\YTDownloader\YTDownloader.exe" /boot
*****************

"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Logon\{2823BCF0-31DF-4A0A-BB47-057676981351}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{2823BCF0-31DF-4A0A-BB47-057676981351}" => Key deleted successfully.
C:\Windows\System32\Tasks\Microsoft\Windows\Maintenance\SMupdate2 => Moved successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\Microsoft\Windows\Maintenance\SMupdate2" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Logon\{823B5FA8-56B9-4C48-9B31-E2040ABD62FA}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{823B5FA8-56B9-4C48-9B31-E2040ABD62FA}" => Key deleted successfully.
C:\Windows\System32\Tasks\VPLWPCWP => Moved successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\VPLWPCWP" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Plain\{90C358DB-9084-4A42-A6BF-F318FE7A75F2}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{90C358DB-9084-4A42-A6BF-F318FE7A75F2}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\SPBIW_UpdateTask_Time_333934303335323932302d7837235a576c4a3241345041" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Plain\{96098C06-6449-4E88-98BD-B90A471EB27E}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{96098C06-6449-4E88-98BD-B90A471EB27E}" => Key deleted successfully.
C:\Windows\System32\Tasks\User_Feed_Synchronization-{D18363F1-F769-4808-A22E-DCA541F04624} => Moved successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\User_Feed_Synchronization-{D18363F1-F769-4808-A22E-DCA541F04624}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Logon\{A7AF9EEA-BC15-4890-BEE9-FAEC43AACE8B}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{A7AF9EEA-BC15-4890-BEE9-FAEC43AACE8B}" => Key deleted successfully.
C:\Windows\System32\Tasks\RG => Moved successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\RG" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Logon\{D0758C78-5C77-45B7-ACD6-3F6D1B557AD0}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{D0758C78-5C77-45B7-ACD6-3F6D1B557AD0}" => Key deleted successfully.
C:\Windows\System32\Tasks\Microsoft\Windows\Multimedia\SMupdate3 => Moved successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\Microsoft\Windows\Multimedia\SMupdate3" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Logon\{D3BD2823-727E-484C-9E69-5E15C3A1A8EE}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{D3BD2823-727E-484C-9E69-5E15C3A1A8EE}" => Key deleted successfully.
C:\Windows\System32\Tasks\YTDownloaderUpd => Moved successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\YTDownloaderUpd" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Plain\{FAA312A8-761C-4060-952B-07A85639FC24}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{FAA312A8-761C-4060-952B-07A85639FC24}" => Key deleted successfully.
C:\Windows\System32\Tasks\{BE07B160-F2A2-4DF5-9882-B5138F615D92} => Moved successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\{BE07B160-F2A2-4DF5-9882-B5138F615D92}" => Key deleted successfully.
C:\Windows\Tasks\RG.job => Moved successfully.
C:\Windows\Tasks\VPLWPCWP.job => Moved successfully.
C:\Users\Christine\AppData\Local\Google\Chrome\User Data\Default\Extensions\ajmanaknibhondipbchdjlfhlfpalicl => Moved successfully.
HKU\S-1-5-21-2133809458-2915696189-3391681213-1000\Software\Microsoft\Windows\CurrentVersion\Run\\YTDownloader => value deleted successfully.

==== End of Fixlog ====

fais le ménage des antivirus et vois ce que cela donne pour les publicités intempestives PriceLess.

ok les pub ne s'affichent plus c'est génial merci pour ton aide précieuse malekal

Pas de problème :)

Voila, c'est terminé, tu peux supprimer les programmes utilisés.

Quelques conseils :

Installe Malwarebyte's Anti-Malware : https://www.malekal.com/tutoriel-malwarebyte-anti-malware/
Fais des scans réguliers avec, il est efficace.

Pour prévenir les sites malicieux, tu peux installer Blockulicious : https://forum.malekal.com/viewtopic.php?t=46656&start=

Pour ne plus te faire avoir.
A lire - Programmes parasites / PUPs : https://www.malekal.com/adwares-pup-protection/