Install avast_free_antivirus_setup.Only select Install:File Protection,Web Shield,Mail Protection,Browser protection.
After installing restart,display:You are at risk,Some real-time protection is turned off.Click Open and fully resolved, there is no response.
But the install avast_free_antivirus ver11.1.2241.1482,no similar problems.Can not find what's Protection missing.
System:windows 8.1 pro X64 with all update,remove ie,outlook.