Build 26300.8687 is not mentioned in the provided documentation. The latest Experimental/Dev channel build in the context is 26300.8553, with earlier builds 26300.8497, 26300.8493, and 26300.8376.
Based on the context, Experimental (formerly Dev) builds are:
- Based on Windows 11, version 25H2 via enablement package KB5054156.
- Delivered through Windows Update with many features controlled by Controlled Feature Rollout (CFR).
- Managed via Settings > Windows Update > Windows Insider Program, including the new Feature flags page for enabling specific preview features.
To obtain the latest available build in this channel according to the context, use Windows Update while enrolled in the Experimental (or Dev, during transition) channel and ensure the device is eligible for Windows 11, version 25H2 via the enablement package.
References:
- Windows 11 Insider Experimental Preview Build 26300.8289
- Windows 11 Insider Experimental Preview Build 26300.8376
- Windows 11 Insider Experimental Preview Build 26300.8493
- Windows 11 Insider Experimental Preview Build 26300.8497
- Windows 11 Insider Experimental Preview Build 26300.8553
- Any Updates from windows 11 release preview 26220.6690 - Microsoft Q&A
- How to install 25H2 enablement package? - Microsoft Q&A
- Reminders for Windows Insiders in the Dev Channel (Soon transitioning to Experimental)
- Changes and Improvements gradually being rolled out
- Reminders for Windows Insiders in the Experimental channel
- Problem updating to the latest preview insider channel build - Microsoft Q&A
- My system has been on RP channel why is it downloading a Beta release? - Microsoft Q&A
- Release Preview channel seems to be missing - Microsoft Q&A