User Account Control: What causes "This app has been blocked for your protection"?

This time, we will explain the reasons why the message "This app has been blocked for your protection. Your administrator has blocked this app from running. Contact your administrator for more information" appears on the User Account Control screen.

In my environment, "ServicesWhen I tried to open it, the User Account Control message appeared and I was unable to open it.

User Account Control: What causes "This app has been blocked for your protection..."?

The reason why the message "This app has been blocked for your protection..." appears on the User Account Control screen is probably because the system is taking control at some point.

For example, if the "mmc.exe" you are trying to run is currently being updated.

This message appeared while I was installing the Windows 10 update "KB5029331."

It's likely that "mmc.exe" was being updated, so the system took control to prevent any disruptions to the update.

After the update was complete, I checked the properties of "mmc.exe" and found that it had been updated to today's date.

If the User Account Control screen displays "This app has been blocked for your protection...", it may be that Windows Update, a program update, or some other software (such as security software) is locking files with higher privileges than the currently running user.

So please wait a while and try again.