Windows 10: Win11 update from Win10 -- Error Code: 0xC1900101 0x40021 The installation failed in the...

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\" folderanther.zipRollback.zipCan someone help me?Best,Bill

:)

 

Windows 11 Installation Error Error Code: 0xC1900101 0x40021

I tried upgrading Windows 10 to Windows 11 using "Check for updates Menu in Settings" and "Windows Installation Assistant" but both fail at the end with the error:

Error Code: 0xC1900101 0x40021

The installation failed in the SECOND_BOOT phase with an error during SYSPREP_RESPECIALIZE operation

I read a thread about this error and said to generate a new thread because each PC got different solution.

Please Help...

The pc is fully compatible in the pc Health Check WIndows 11 requirements.

 

Windows 11 Installation Error - Error Code: 0xC1900101 0x40021

Hello.

I tried installing Windows 11 23H2 from 22H2 using ISO but it fails and rolls back at the end with the error:

Error Code: 0xC1900101 0x40021

The installation failed in the SECOND_BOOT phase with an error during SYSPREP_RESPECIALIZE operation

Can't seem to find any documentation regarding this error.

Looking at a previous post with same error (Redirecting), i've saved the following files:

• C:\$Windows.~BT\Sources\Panther\Setupact.log
  
• C:\$Windows.~BT\Sources\Rollback\Setupact.log
  
• C:/$Windows.~bt\Sources\Rollback\setupapi\setupapi.dev.log
  
• C:\$Windows.~BT\Sources\Rollback\Setupmem.dmp
  

and used "setupdiag /ZipLogs:True" to create the Logs.zip file, but don't know what to search for.

Any help on this?

Many thanks in advance for your support.

 

Windows 11 Installation Error Error Code: 0xC1900101 0x40021

I tried installing Windows 11 downloading the ISO image and creating a usb unit but it fails at the end with the error: Error Code: 0xC1900101 0x40021 The installation failed in the SECOND_BOOT phase with an error during SYSPREP_RESPECIALIZE operation I don't know what else can I do.

I've tried installing using the other methods.
Check for updates Menu in Settings- It displays "Great news—your PC meets the minimum system requirements for Windows 11."
Windows Installation Assistant - It does the entire process of downloading and installing Windows 11 and ultimately reboots into WIndows 10. Also, the pc is fully compatible in the pc Health Check WIndows 11 requirements.