Windows 10 Win11 update from Win10 -- Error Code: 0xC1900101 0x40021 The installation failed in the SECOND_BOOT phase with an error during SYSPREP_RESPECIALIZE o

  • Thread starter Thread starter Bill Lou
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Bill Lou

Hi Team,I keep getting win 11 update failure from win 10. The system auto update and `Windows11InstallationAssistant` doesn't work for me. Recently, I download the ISO and it shows the error message after another update failure ```0xC1900101 0x40021 The installation failed in the SECOND_BOOT phase with an error during SYSPREP_RESPECIALIZE operation```Here is the Open the "Panther" and "Rollback" folder in "C:\$WINDOWS.~BT\Sources\" folder:Panther.zipRollback.zipCan someone help me?Best,Bill

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