Under Virus & threat protection settings, click on Manage settings.Follow the below steps to set an exception for the app. If the firewall blocking NMM message still appears even after allowing the app through Firewall, you may want to turn of the Windows Firewall, but that’s risky, so let’s try the next best alternative setting an exception for Nexus Mods Manager. Ensure both Public and Private are ticked and click Ok to save the changes.įix 4: Set Exception for NMM on Windows Defender.Select the NMM application and click Add.exe file, right-click on the desktop or startup icon and select open file location, copy the path) Click on Allow another app… (to find the exact location of the NMM.Locate and click on Firewall& network protection.Select Windows Security from the left panel.Press Windows Key + I to open Windows Settings.