Windows 11 KB5070312 (OS Build 22631.6276) Preview for 23H2 released
Microsoft has rolled out KB5070312, a non-security update for Windows 11 version 23H2. This release brings several quality improvements to enhance user experience.
For those users running OS Build 22631.6276, a preview version of this update is now available through Windows Update. This specific build should eventually get pushed out normally too, but meanwhile, anyone wanting to try it might find their device eligible via the standard channels soon enough, assuming you're on that path.
If you haven't already done so, there's an important prerequisite: ensure that EKB KB5027397 is installed. This earlier update needs to be present for the installation of KB5070312 to work properly and ensure a smooth transition onto Windows 11 version 23H2.
Now, what does this fix? Well, it targets several issues reported by users:
- One thing involves outdated profiles for some mobile operators. If you're using Country Operator Settings Assets (COSA), the update should clear up any problems stemming from old configurations.
- File Explorer's speed is another area addressed. There are cases where clicking did nothing or caused delays, and this should help resolve that frustrating unresponsiveness for users.
Beyond that, KB5070312 also resolves issues specifically tied to managing Windows 11 in enterprise settings. It tackles a problem encountered by IT pros overseeing multi-session environments like Azure Virtual Desktop (AVD). Now, either Group Policy or Configuration Service Provider (CSP) can implement the 'HideRecommendedSection' policy as intended, ensuring respect for control.
Basically, if your system has already received previous updates, including EKB KB5027397, this new package should just install cleanly without requiring anything extra.
November 20, 2025—KB5070312 (OS Build 22631.6276) Preview - Microsoft Support
November 20, 2025—KB5070312 (OS Build 22631.6276) Preview - Microsoft Support
