I traced my excessive Disk usage to WmiPrvSE.exe
And as you can see, I've found a solution.
Open your Services program. The easiest way to find is just click Start, type Services, hit Enter.
Under Services (Local), scroll down until you find the “Windows Management Instrumentation” service and select Restart.
Well Bob, I know you are very helpful...however this did nothing. I did click restart on that yesterday. Rebooted my PC and the same issue. Massive amounts of CPU usage and my poor drive is taking a a whooping. Plus, when I go online it take 3 times as long for a page to load than it did before the most current version 2015.10.2. 2215.
I did some further checking and I question for you. When I open my task manager to processes, I click all users.
I am attaching a snip--maybe you can tell me why the differences in users for different Avast processes. I am still believing this is an Avast issue.
Hoping for help. Thanks Bob!