This update contains many attractive new features and improvements.
For example, the Copilot experience is improved, allowing you to pin it to the taskbar.
The Windows Spotlight experience is also optimized.

Learn more information from this official blog:Announcing Windows 11 Insider Preview Build 22635.3785 (Beta Channel).
How to Download and Install KB5039307?
After that, you’re able to check for updates, and then download and install KB5039319.

Here are some available fixes.
PressWindows + Ito bring up the prefs app.
Go toSystem > Troubleshoot > Other Troubleshooters.

On the next interface, click theRunbutton next toWindows Update.
Then, this tool will run and fix the found update issues automatically.
Fix 2: Delete the Old Windows Update Files
Believe it or not.

The old Windows installation files can cause new update installation failures.
Fix 3: Run CHKDSK
Corrupted system files could be another reason why KB5039319 fails to install.
you’re able to run CHKDSK to rule out this possibility.
Step 1.Run Command Prompt as administrator.
Typechkdsk C: /fand pressEnterto run it in Command Prompt.
Step 4. reboot your PC and CHKDSK will run to find and fix issues.
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