Microsoft Toolkit 265 Fixed May 2026

Users reported that the AutoKMS module would flash a command prompt for a split second and vanish without performing any activation. This was due to a missing or corrupt AutoKMS.exe dependency.

If you are an organization, Microsoft provides a genuine KMS host. For individuals, you can run a local KMS server using a free Windows Server evaluation (180 days). microsoft toolkit 265 fixed

When clicking the "EZ-Activator" button, the tool would crash with: Users reported that the AutoKMS module would flash

Object reference not set to an instance of an object. Object reference not set to an instance of an object

Why? The tool relied on an embedded list of product IDs and KMS client keys. When Microsoft released new builds of Windows 11 (23H2, 24H2) and Office 2021 LTSC, the internal database in MTK 265 became outdated. The tool failed to map the new OS version to an existing function.

For Windows 10/11, tools like Microsoft Activation Scripts (MAS) use the legitimate HWID method. This is open source, actively maintained, and does not rely on outdated "265" code. (Note: MAS is also not officially endorsed by Microsoft, but it does not require the broken MTK 265 infrastructure).