Windows Turned On Default Blocking For Potentially Unwanted Apps
Microsoft made a small but significant change to Windows 10 recently as it relates to PUAs (Potentially Unwanted Apps). It wasn't something that got a lot of press but it's a change well worth knowing about.
Beginning with the May 2020 update for Windows 10, 2004, the Redmond Giant added a PUA blocking feature to Microsoft Defender. This new feature employs Machine Learning to determine if an app is Potentially Unwanted by a user and block that app if such a determination is made.
When the feature was first introduced it was turned off by default. That changed with the August update. The feature is now enabled by default. The system isn't perfect and some users may not want Windows doing their thinking for them.
If you fall into that category you can disable PUA blocking thusly:
Open your Windows Security setting screen
Select Reputation-Based Protection Settings
Once you're on that page you will see the option to turn off the PUA Blocking feature. Note that on this screen there are two check boxes: Block Apps and Block Downloads.
If the App Blocking box is unchecked it will disable Microsoft Defender's ability to block PUAs. However it will leave the functionality enabled so that Microsoft Edge can use it to block unwanted downloads automatically. Turning it off entirely will disable both functionalities.
If you decide to leave the feature enabled you may note that it occasionally blocks legitimate apps. If that happens you can create exclusions in Microsoft Defender to keep it from identifying an app you actually want to use as unwanted.
This is a good change overall but some people will find it bothersome. The good news is that Microsoft has made it easy to switch the feature back off if it's not something you find value in.
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