Microsoft has finally fixed Windows 11 May Patch Tuesday install issues

Microsoft says Windows 11 KB5089549 install failures are fixed after installing preview update KB5089573.

A couple of weeks ago, we reported that several people are facing installation failures while trying to apply May's Patch Tuesday updates (KB5089549) on Windows 11. This issue was triggered under certain conditions, but it was particularly annoying as it impacted consumers across Windows 11 version 24H2 and 25H2. Now, Microsoft has confirmed that it has finally resolved this bug.

Fortunately, the patch for this problem is quite simple as impacted customers only need to install the non-security preview update released as KB5089573 a couple of days ago. Once that is installed, this issue should be resolved automatically and no further action or workaround is required beyond that point.

This should come as a relief for impacted Windows 11 customers as Microsoft's previous workarounds involved modifying the Windows Registry or performing Known Issue Rollback (KIR). The former method can be quite stressful for newbies as any incorrect modification to the Windows Registry can cause major system issues.

Prior to the latest patch, impacted users would be greeted with error code 0x800f0922 when trying to install May's Patch Tuesday update, typically around the 35-36% completion mark of the reboot phase. This was a bit of a nuisance as the error message ambiguously stated that "Something didn’t go as planned. Undoing changes.", and simply roll back. Microsoft confirmed that this was happening on devices with 10MB or less free space available on the EFI System Partition (ESP).

It's also interesting that the fix for this issue involves installing the KB5089573 non-security update. This release introduces a ton of major features including performance boosts through Low Latency Profile, Shared Audio, enhancements to Task Manager, Windows Search upgrades, and a lot more. You can check out the details here, and either install the preview update or wait for it to become generally available with April's Patch Tuesday on April 9.

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Posted Saturday 30 May 2026 at 7:57 am AEST (my time).

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