Thanks everyone for your help. How long would you suggest I delay the MBAM protection at startup?

Also, do you think it could be the update to MBAM 2.0 that has been preventing my system from being able to upgrade to Windows 8.1? MBAM is the first thing I installed everytime I clean installed Windows 8 before trying to upgrade to 8.1 and the upgrade had worked in the past before MBAM 2.0