Microsoft has released an update for Windows 11 Build 25290, which was released to Windows Insiders on Monday. It comes in the form of cumulative update Build 25290.1010 (KB50234461) and contains nothing new, as it is designed to test the servicing pipeline.
The full announcement says:
We are starting to roll out Cumulative Update Build 25290.1010 (KB50234461). This update does not include anything new and is designed to test our servicing pipeline for Dev Channel releases.
Therefore, all bug fixes and improvements that were announced with build 25290 previously released on the Dev Channel are carried over to this one. Interestingly, while no new changes were made to this release, maintaining test builds like these was known to break some functionality. For example, in the previous version of Windows, on Windows 10 Build 21292.1010 in particular, it caused x64 emulation issues on ARM PCs.
The official announcement can be found on Microsoft’s website here.