How to Enable Adware or PUA Protection in Microsoft Security Essentials. You can enable PUA or adware protection in Windows Defender using different methods explained in the article How to Enable PUA, PUP or Adware Protection in Windows Defender. But, if youre still using Windows 7 and relying on Microsoft Security Essentials MSE for real time antivirus protection, this post has the info on how to enable adware, PUP or PUA protection in MSE. There are two methods using the registry for enabling PUP, PUA or adware protection in Microsoft Security Essentials. For MSE and Forefront client, you implement the registry value PUAProtection or Mp. Enable. Pus in a different branch than the one used for Windows Defender. And, the Power. Shell method Set Mp. Preference cmdlet that I posted earlier doesnt work in Windows 7. Option 1 Start the Registry Editor regedit. HKEYLOCALMACHINESOFTWAREPoliciesMicrosoftMicrosoft Antimalware. Create a DWORD value named PUAProtection and set its data to 1. Exit the Registry Editor. Option 2 Go to this registry key HKEYLOCALMACHINESOFTWAREPoliciesMicrosoftMicrosoft AntimalwareMp. Engine. Note The key Mp. Engine need to be manually created as it doesnt exist by default. Create a DWORD value named Mp. Microsoft Security Essentials. Enable. Pus and set its data to 1. Exit the Registry Editor. Update the definitions or restart Windows for the change to take effect. That should block adware or PUAs from being downloaded or run. Yes. It does work tested on Windows 7 with MSE Microsoft Antimalware client version 4. Since Windows 7 still has the majority of the OS market share of 4. MSE topped the antivirus product market share with 1. Endpoint Protection, part of Microsoft System Center 2012 R2, is designed with large enterprises in mind. It offers antimalware configuration, reporting, deployment. Vulnerability Severity Rating and Maximum Security Impact by Affected Software. Antimalware Software. Denial of Service Vulnerability in Microsoft Malware. Jan 2. 01. 5 cant find the latest report for 2. I hope many people would find this post useful. About the author. Ramesh Srinivasan founded Winhelponline. He is passionate about Microsoft technologies and has a vast experience in the ITe. S industry delivering support for Microsofts consumer products. He has been a Microsoft MVP 2. Windows support forums.