After decades of experience, I've come to the conclusion that Trend has difficulty getting their software to do anything automatically. When I boot up, I am not confident that Trend is protecting me, so I RUN AS ADMINISTRATOR and then UPDATE manually---then MINIMIZE. The fact that my manual updates usually download a new update tells me that Trend was not about to do so on its own. When I'm done working, I go to DEVICES & maximize my computer---then SCAN & SHUT DOWN WHEN FINISHED.
I am not a computer guy, but can tell you that this process has resulted in zero infections, zero malware & zero problems with my computers.