Windows 11 Insider Preview Feature Update (26220.7271) error code：0xc1900101

The error code 0xc1900101 typically indicates a rollback during the Windows upgrade process, often due to incompatible drivers. This error can occur at any stage of the upgrade, and it is commonly associated with issues such as blue screens, system hangs, or unexpected reboots.

To resolve this issue when updating to Windows 11 Insider Preview Feature Update (26220.7271), you can try the following steps:

1. Uninstall any antivirus applications that may interfere with the upgrade process.
2. Disconnect all peripheral devices except for the mouse, keyboard, and display.
3. Update all drivers and your BIOS to the latest versions.
4. Perform a clean boot to minimize the number of drivers and startup programs running during the upgrade. You can find instructions on how to perform a clean boot in Windows here.
5. Ensure that you select the option to "Download and install updates (recommended)" during the upgrade process.

If these steps do not resolve the issue, further investigation into the supplemental log files may be necessary to identify specific driver conflicts.

References:

• Windows 10 upgrade resolution procedures