Hi, i'm in dual boot whit 7 Pro. How do install MSE 4 (beta? yes?). for me it's impossible. Windows Defender works for me, it's just a test.
MSE4 install is simple.. extract the exe setup file with 7zip... start then the "epplauncher.exe" with admin rights then it works for me for the updates (when you dont wanna install it with windows update) extract the update setup... start "epp.msi" and it works
h__p://answers.microsoft.com/en-us/windows/forum/windows_8-security/windows-defender-on-windows-8-unable-to-update/8faacc60-6b74-43be-95b0-8a9d6a82b228