Dell OS Recovery Tool with error

J'ai un DELL Precision M6600, sur lequel WIN7 pro fonctionne exclusivement en mode safe avec réseau. Je voulais réinstaller WIN7, mais l'outil Dell OS Recovery Tool ne fonctionne pas. La lecture du fichier d'erreur donne ceci : ========================================================================================= Update Package Execution Started [Fri Jun 7 08:05:46 2019] Original command line: "D:\Downloads\Dell-USB-Recovery-Tool_GRRDM_WIN_2.2.4060.0_A00.EXE" [Fri Jun 7 08:05:46 2019] DUP Framework EXE Version: 3.8.1.41 [Fri Jun 7 08:05:46 2019] DUP Release: GRRDMA00 [Fri Jun 7 08:05:46 2019] Initializing framework... [Fri Jun 7 08:05:46 2019] Data in smbios table is (hex)value = 9 , Chasis type (hex)value = 9 , System type is : Client [Fri Jun 7 08:05:47 2019] logo.png [Fri Jun 7 08:05:55 2019] User Command: attended [Fri Jun 7 08:05:55 2019] DUP Capabilities Value: 2097151 (0x1FFFFF) [Fri Jun 7 08:05:55 2019] DUP Vendor Software Version: 2.2.4060.0 [Fri Jun 7 08:05:55 2019] Local System/Model Compatible with this Package? Yes [Fri Jun 7 08:05:55 2019] Local System OS Version: 6.1.1.0 [Fri Jun 7 08:05:55 2019] OS Compatible with this Package? Yes [Fri Jun 7 08:05:55 2019] Local System OS Language: FR [Fri Jun 7 08:05:55 2019] Language Compatible with this Package? Unknown [Fri Jun 7 08:05:55 2019] Identified Behavior : attended [Fri Jun 7 08:05:55 2019] Extraction-miniunz path: c:\PROGRA~3\dell\drivers\07DA1F~1\miniunz.exe [Fri Jun 7 08:05:55 2019] Extraction-arguments: -x D:\DOWNLO~1\DELL-U~1.EXE -o -d c:\PROGRA~3\dell\drivers\07DA1F~1 [Fri Jun 7 08:05:55 2019] Extraction-GetExitCode: 0 [Fri Jun 7 08:05:55 2019] Identified Behavior : attended [Fri Jun 7 08:05:55 2019] Temporary payload log file name: C:\ProgramData\dell\drivers\07da1f36-ad6d-4aa5-846b-b184fe7b00ff\DUPLogDir\DUP75C7.tmp [Fri Jun 7 08:05:55 2019] Translated Command Line : DellOSRecoveryTool.exe /quiet /lv "C:\ProgramData\dell\drivers\07da1f36-ad6d-4aa5-846b-b184fe7b00ff\DUPLogDir\DUP75C7.tmp" [Fri Jun 7 08:05:55 2019] Path : C:\ProgramData\dell\drivers\07da1f36-ad6d-4aa5-846b-b184fe7b00ff [Fri Jun 7 08:05:55 2019] Identified Behavior : attended [Fri Jun 7 08:06:03 2019] Append Vendor Software Log: C:\ProgramData\dell\drivers\07da1f36-ad6d-4aa5-846b-b184fe7b00ff\DUPLogDir [Fri Jun 7 08:06:03 2019] --- Start of Vendor Software Log --- [Fri Jun 7 08:06:03 2019] --- End of Vendor Software Log --- [Fri Jun 7 08:06:03 2019] Vendor Software Return Code: 2147944001 [Fri Jun 7 08:06:03 2019] logo.png [Fri Jun 7 08:06:03 2019] (MUPXMLParser::GetResultName): *** Vendor Return Code is not found in Mup.xml [Fri Jun 7 08:06:03 2019] Name of Exit Code: [Fri Jun 7 08:06:03 2019] (DupAPI::GetReturnCode): *** Unable to find DUP value for: [Fri Jun 7 08:06:03 2019] Exit Code set to: 1 (0x1) [Fri Jun 7 08:06:03 2019] Result: FAILURE ========================================================================================= Quel est le problème, svp? Merci pour vos réponses