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…