This policy setting turns on the improved detection for Potentially Unwanted Applications (PUAs).
This blocks PUAs from being downloaded through Internet Explorer, Firefox, and Chrome. It also detects PUAs in the following circumstances and locations:
A file that has Mark of the Web (MOTW)
A file in the Downloads folder
A file in the Temp folder
It will not detect outside these folders and will not remove already installed PUAs.
If you enable this setting, the improved PUA detection will be used, however, existing PUAs will not be detected or removed.
If you disable or do not configure this setting, the improved PUA detection will not be used.
| Registry Hive | HKEY_LOCAL_MACHINE |
| Registry Path | Software\Policies\Microsoft\Microsoft Antimalware\MpEngine |
| Value Name | MpEnablePUS |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |