Windows 11 users trying to escape the buggy KB5074109 update are running into a new problem: the uninstall process itself is failing with error 0x800f0905. Instead of rolling back cleanly, Windows throws another roadblock, leaving people stuck between a broken update and a broken uninstall tool. If you’re hitting the same dead end, there are a few troubleshooting steps that can actually get the rollback moving again.
To refresh, on Windows 11, the January 2026 Security Update (KB5074109) has been causing tons of issues, from performance issues to broken features, and even after Microsoft openly told people to uninstall the update, some users are now even noticing the 0x800F0905 error when trying to remove the buggy update.
