Hi,
a few days ago, Avast notified me that there was an update available, I installed it the day after I got the notification, which was August 22nd. Right after installing the update, I restarted my computer as Avast told me to do, and ever since then, after every PC boot unsecapp.exe ("sink to receive asynchronous callbacks for wmi client application") is running constantly. While it is a legit Microsoft program, I have never had it run on my Windows 10 computer ever, only on my Windows 8 laptop. Why is that thing suddenly constantly running after the Avast update? Aside from the update, I didn't change anything else on my system, no new installs or anything.