Whats New in Windows 11 Insider Preview Build 22635.3930 (KB5040550)?
How to Install Windows 11 Insider Preview Build 22635.3930 (KB5040550)?
Go toStart > controls > Windows Update.

Turn onGet the latest updates as soon as theyre available.
Click theCheck for updatesbutton and see if the update is available.
Click theDownload and installbutton to install this update.

Step 6. reset your box to complete the update.
What to Do if Windows 11 Insider Preview Build 22635.3930 (KB5040550) Fails to Install?
Due to some reason, KB5040550 may fail to install on your machine.
If so, you’ve got the option to try the following methods to solve the issue.
Here are the steps to run this tool.
Go toStart > prefs > System > Troubleshoot > Other Troubleshooters.
This tool starts to run and automatically fixes the found issues.
Check for updates again in Windows Update and see if KB5040550 can install successfully this time.
Way 2.
So, it’s possible for you to alsodelete the previous update filesto have a shot.
Fix 3: Run CHKDSK
Damaged system files can lead to a failed Windows update.
you might run CHKDSK to fix the system files.
Run Command Prompt as administrator.
Typechkdsk C: /fand press Enter to run this command into Command Prompt.
Step 4. cycle your PC.
CHKDSK will run to find and fix issues.
You should wait patiently until the process ends.
If you want to recover deleted files on Windows 11, you might just try this software.
you might refer to this post to do the job.