Build 26300.8497 is not listed in the provided release notes. The latest documented Experimental (formerly Dev) channel build in the context is 26300.8493, based on Windows 11, version 25H2 via the KB5054156 enablement package. That build is available through Windows Update for devices enrolled in the Experimental channel and may use Controlled Feature Rollout, so not all devices receive all features at once.
For information-only announcement posts about new Insider builds, issues or questions should be opened in separate threads, as indicated in the screenshot text.
References:
- Windows 11 Insider Experimental Preview Build 26300.8493
- Windows 11 Insider Experimental Preview Build 26300.8376
- Windows 11 Insider Experimental Preview Build 26300.8289
- Set up a Dev Drive on Windows 11
- Add attachments to Microsoft Q&A
- My system has been on RP channel why is it downloading a Beta release? - Microsoft Q&A 24 Feb 2026. My system has been on Release Preview for the longest time. Just went to Windows Update and it is downloading a Beta Channel Release. I have never changed to Beta Channel so why in the world is it downloading Beta???????
- Release Preview channel seems to be missing - Microsoft Q&A I restarted my PC and the same thing happened. I didn't realise I was switched to the Beta channel automatically. Screenshot enclosed:
- Any Updates from windows 11 release preview 26220.6690 - Microsoft Q&A No updates since 9/28/2025.
- How to install 25H2 enablement package? - Microsoft Q&A I'm looking for guidance on how to install the 25H2 enablement package on my Windows system. I am unsure about the proper steps to download and activate this update, and I want to ensure I do it correctly without causing any issues with my current setup.
- MVC140.DLL Error after Windows OS Updates - Microsoft Q&A Background: