Forum Discussion

HenkR's avatar
HenkR
Copper Contributor
Mar 11, 2026

Failure Insider program update 26220.7961

I am encountering error 0xc1900101 at the end of the update process for build 26220.7961. Despite three attempts, the installation fails and rolls back. I have been a member of the Windows Insider Program since 2022 and have never experienced issues with security or feature updates until this specific version.
What can be the problem?

Update management

3 Replies

  • HenkR's avatar
    HenkR
    Copper Contributor
    Mar 13, 2026

    I've exhausted all options, but the update still won't work. I'm going to perform a completely new installation now. Sadly, there's no other choice.
    Thank you for all your responses.

  • KapilArya's avatar
    KapilArya
    MVP
    Mar 13, 2026

    0xc1900101 error often associated with conflict from external devices.

    Make sure you temporarily disconnect external devices while upgrade.

    If issue still persists, try upgrading in a clean boot environment.

  • Samkkinlon's avatar
    Samkkinlon
    Iron Contributor
    Mar 13, 2026

    Error 0xc1900101 is a common Windows Update error that typically indicates a driver or hardware compatibility issue preventing the update from completing successfully. Since you're experiencing this with build 26220.7961 and you've been a Windows Insider since 2022.