Windows 11 Installation Error Error Code: 0xC1900101 0x40021

Question

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.

Answer 1

Hi Felix,

Uninstall FolderMill, and delete the folder "C:\Program Files (x86)\FolderMill".

That should fix the issue.

Answer 2

How did you find a faulting FolderMill driver?

Answer 3

You're welcome.

Glad to have helped.

Regards,

Answer 4

Hi,

Sorry I can't seem to run the log collector, it says error, and I didn;t record the error.

And now I have successfully installed the Win11 upgrade.

Thank you Ramesh

Answer 5

When available please post a V2 log collector share link into the newest post.

Where was FolderMill seen?

0xC1900101, 0x4000D

0xC1900101 - 0x4000D	Check supplemental rollback logs for a setupmem.dmp file, or event logs for any unexpected reboots or errors. <br>Review the rollback log and determine the stop code. <br>The rollback log is located in the $Windows.~BT\Sources\Rollback folder. An example analysis is shown below. This example isn't representative of all cases: <br>  <br>Info SP Crash 0x0000007E detected <br>Info SP Module name : <br>Info SP Bugcheck parameter 1: 0xFFFFFFFFC0000005 <br>Info SP Bugcheck parameter 2: 0xFFFFF8015BC0036A <br>Info SP Bugcheck parameter 3: 0xFFFFD000E5D23728 <br>Info SP Bugcheck parameter 4: 0xFFFFD000E5D22F40 <br>Info SP Can't recover the system. <br>Info SP Rollback: Showing splash window with restoring text: Restoring your previous version of Windows. <br>  <br>Typically, there's a dump file for the crash to analyze. If you aren't equipped to debug the dump, then attempt the following basic troubleshooting procedures: <br>  <br>1. Make sure you have enough disk space. <br>2. If a driver is identified in the bug check message, disable the driver or check with the manufacturer for driver updates. <br>3. Try changing video adapters. <br>4. Check with your hardware vendor for any BIOS updates. <br>5. Disable BIOS memory options such as caching or shadowing.	A rollback occurred due to a driver configuration issue. <br>Installation failed during the second boot phase while attempting the MIGRATE_DATA operation. <br>This can occur because of incompatible drivers.