Thanks, this worked for a while but you have to be careful as there is no warning when Windows Defender will be turned off and MWB made the primary anti-virus. What is the harm in changing the setting in MWB in Windows Action Center as "Never Register" - See below from MWB explanation of this section. Windows Action Center You may have noticed a flag in your system tray that sometimes has a red icon with a white X appear over the flag. That is a status indicator for the Windows Action Center, which tells you when your computer has a security issue that needs your attention. Malwarebytes Premium or Malwarebytes Premium Trial can now be registered as a security solution on your computer. There are three settings available, which will be abbreviated here for easier reading. Brief descriptions for the meaning of each setting are also provided. Let Malwarebytes choose whether to register: Malwarebytes will determine whether it should be registered in Action Center. The program will not register when Microsoft Security Essentials is in use on a Windows 7 or older operating system. It will also not register when Windows Defender is used on a Windows 8 or newer OS. Always register Malwarebytes: Malwarebytes program status will always appear in Action Center. Never register Malwarebytes: Malwarebytes program status will never appear in Action Center.