This issue may be triggered by corrupted or missing Windows Updates, third-party antivirus software, etc.
For this, go toSettings>Update & Security>Windows Update>View installed update history.
If you could confirm that updates have been installed, you just need to ignore the warning pop-up.

If updates failed to be installed, move to the next steps to troubleshoot.
So if you have installed one on your gear, wise to disable it to fix the error.
This post Multiple Ways to Disable Avast for PC and Mac Temporarily/Completelymay be the one you need.

There may be a third-party system running in the background that prevents the Windows Update from downloading the updates.
Step 2:Navigate to theServicestab and check theHide all Microsoft servicesoption.
Step 3:Now click theDisableallbutton to disable all of the third-party services.

Step 4:Then clickApplyto save changes and exit.
Then all of the Microsoft related services will be left and all of the third-party services will be disabled.
Step 5:Now navigate to theStartuptab and click theOpen Task Manageroption.

Then you will be redirected to the task manager.
Step 6: Select each service one by one and click theDisablebutton.
Now you could kickstart your gear and venture to install updates.

If it works properly, it means that the issue is due to some service or tool.
Then you could find out the software that causes the issue.
To delete the contents of the Windows SoftwareDistribution folder, it’s possible for you to follow the steps.

Step 1:TypeCommand Promptin theSearchmenu.
trigger the above command again after restarting.
Now you will be able to delete files from the Software Distribution folder on Windows 10.

If the error still exists, try the next fix Windows Update troubleshooter.
you might use it to fix the you cant update Windows issue.
Navigate to theUpdate & Securitysection and then selectTroubleshootin the left panel.

Step 2: ClickWindows Updateunder theGet up and runningsection in the right panel and then clickRun the troubleshooter.
Step 3: Wait for the scanning process to detect the existing problems and then clickApply this fix.
If this method cannot fix the error, then you might try the next methods.

Here is how to do that:
Step 1:Open theSettingsapplication again and go to theUpdate & Securitysection.
Then clickView update history.
Step 2:Copy the recent KB number of the Windows Update package.

Step 3:Go to theMicrosoft Update Catalogwebsite.
Paste the KB number of the Windows Update package in theSearchbox and pressEnter.
Step 4:Click theDownloadbutton and a popup window will appear.

In the popup window, smack the.msu filelink to download it.
When the file has finished downloading, double-nudge the .msu file and Windows will load the new update.
Then the Windows cant install updates issue should be fixed.
Step 3:ClickInstall Nowto continue.
You should chooseI dont have a product keyand your copy of Windows will be automatically activated later.
Step 4:snag the operating system you want to install.
Step 5:Accept the license terms.
Then, choose the bang out of installation and choose the second option.
Step 6:Next, choose where you want to install Windows.
You should choose the partition with the current installation of Windows.
After finishing the installation process, you better follow the on-screen instructions to configure the prefs.
Then make a run at run Windows Update again, and the error should be fixed.
Here is all the information on how to fix the we couldnt finish installing updates Windows 10 issue.
Thanks for this post.
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