I've gotten that error a few times when selecting "Fix Now" next to the warning that Real-Time Protection is disabled. When I get it, I get prompted to restart my computer to reinstall the Anti-Rootkit drivers, though on the scan that occurs on restart I still get an Anti-RK error. Other times selecting "Fix Now" simply doesn't do anything. I can manually select the radio buttons to enable Malware and Malicious Website Protection, but when I reopen MBAM or restart my computer, they are still unselected. Also, MBAM doesn't seem to be starting on boot, though the option for it to do so is checked.