Microsoft Security Essentials and Windows Defender mutually exclusive

[blumesan]

Running win7x64.
If I have Microsoft Security Essentials "active" I am unable to turn on Windows Defender.
If I turn off MSE then I can turn on Defender.
If I then return to MSE and activate it, Defender is automatically turned off.

Is this normal behavior?
If I can only run one of these, which is the preferred choice?

 

[oscer1]

Hi, yes that is normal behavior. i would use MSE over defender.

 

[Layback Bear]

Mse is designed to turn off Defender in Windows 7.

As oscer1 has posted. Use MSE.
Then check if the Windows 7 built in firewall is on.

Start Orb and type in Windows Firewall and tick on it. It should indicate that the Windows 7 firewall is on.