Microsoft has confirmed that the Windows 11 Media Creation Tool (MCT) is working again on Windows 10 22H2 and Windows 11 25H2 systems.

MCT is a free tool that helps download the latest version of Windows and create bootable installation media for system recovery, clean installs, or upgrading to a new device.

As Microsoft confirmed earlier this month, MCT stopped working on up-to-date on Windows 10 PCs and Windows 11 Arm64 PCs after installing the Windows 11 2025 Update.

Affected users would see the media creation tool close unexpectedly, with no error message, while on Windows 11 25H2 devices, it would display the "We're not sure what happened, but we're unable to run this tool on your PC" error message.

As a workaround, the company advised users to download a Disk Image (ISO) for x64 devices directly from Microsoft and switch to an AMD64 Windows 11 PC to create Windows bootable installation media.

Microsoft has now fixed these issues with the KB5067036 October 2025 preview update released this Tuesday.

"This issue was resolved in KB5067036. The Windows 11 Media Creation Tool was updated on October 28, 2025, and is available for download," Microsoft said.

"As always, bootable media can also be downloaded directly at this site, under the section titled 'Download Windows 11 Disk Image (ISO) for x64 devices'," it added in a Windows release health dashboard update.

The KB5067036 optional cumulative update that fixed MCT also rolled out an updated Start Menu and the Administrator Protection feature.

In the same update, Microsoft resolved a known issue that caused Windows updates to fail, leading to 0x800F081F errors on Windows 11 24H2 systems.

Microsoft also warned customers last week that Windows updates released since August 29, 2025, are breaking authentication on systems that share Security Identifiers (SIDs) due to newly added security protections that enforce SID checks.