Breach404
Back to Insights
Cybersecurity2 min readJune 1, 2026

Microsoft fixes KB5089549 Windows security update install issues

Microsoft has resolved installation failures and 0x800f0922 errors that prevented Windows 11 systems from applying the May 2026 security update KB5089549. If you experienced update failures on Windows 11, you should retry the installation now that the fix

Could your website be vulnerable to attacks like this?

Run a free 10-point security scan on your site — headers, SSL, DNS, and more. Results in 15 seconds.

Test Your Site Now — It's Free