Hi, I've also been having this exact same problem with Windows 1709 (FCU) and MBAM.
If I boot cold from a shutdown state, Windows works fine. However, if I reboot Windows and then log in, the start button is unresponsive. I have to power down the system, then boot it cold for it to work normally. It appears to be some weird driver issue and MBAM? If I uninstall my AMD drivers use DDU, Windows works fine. If I remove MBAM, Windows works fine. But if both are installed, the start button will not work on reboot. And I too get that error "Task Host Windows"... that was displayed on the first page of this thread.
This is off a totally clean install of Windows 1709. My system.
Dell XPS 8700 with 16GB RAM and i7 4770.
AMD R9 290 with the latest drivers (I've installed all the latest AMD drivers since 1709 was released; still have same issue).
Creative Soundblaster Z with latest driver (dated March 2017)
I am also using a Logitech wireless keybooard and mouse, but not the Logitech software.