How to remove this warning pop-up?
This post fromMiniToolprovides some useful solutions.
If it is malfunctioning, you could try the following solutions.

This post provides some fixes for you.
Step 1: Press theWindowskey and theRkey at the same time to open theRundialog.
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\BFE
Step 4: Right-click BFE to choosePermissiion…. ClickAdd…and typeEveryoneand clickCheck Names.
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Step 2: Go toVirus & threat protection > Scan options.
Step 3: SelectMicrosoft Defender Antivirus (offline scan)and then clickScan now.
Step 2: ClickPrograms and Features.

ClickView Installed updatesand then uninstall the latest security update.
To do that, you’ve got the option to try thegreat backup assistant MiniTool ShadowMaker.
Now, download and try it to safeguard your PC.

If you come across the same error, try these solutions.