Computer was fine last night (5/19, ~12:30AM EST), but when I started it up this morning (~7 hours later), an orange-background popup from the SysTray informed me that MWB real-time protection was off. Clicking the button to turn it on resulted in the popup closing & then reappearing, repeatedly. The icon in the tray has a little orange triangle in front of it. Right-clicking reals that Web Protection is off & grayed out.
Now, I open MWB & the dashboard has the orange "!" in circle. If I go to Settings | Protection & attempt to turn on Web Protection, it either immediately turns off again or gets stuck on "Starting..." And if I go back to the dashboard & attempt a manual scan, it self-terminates within seconds.
So, a bit of online searching & I came across the instructions for a clean uninstall. Downloaded & ran the uninstaller, rebooted & got a little MWB box stating that it couldn't connect to the "service." But I downloaded & installed 3.1.2 (was running 3.0.6, previously, because I hadn't known of a newer version). RTP was on until after the second restart & now I'm back to the same problems (stated above). My PC is running Windows 10 Anniversary, 64-Bit.
Thinking that maybe I might've had some type of virus or malware that has compromised MWB, I did a full scan w/ Windows Defender & online scans from ESET & TM Housecall. All turned up negative. The needed files, as per bdubrow's post (also found via search) have been attached.
mb-check-results.zip
FRST.txt
Addition.txt