My CPU usage used to be 10% at idle (using no high-CPU apps) even after I upgraded Windows 8.1 Pro to Windows 10 Pro.
After Windows 10 Anniversary Updates however, my CPU usage skyrocketed 4 times higher, so now it's around 40% at idle.
I have done full anti-virus scans (Webroot) and anti-malware scans (Malwarebytes), and both report no problems.
-How do I locate and fix this high-CPU-usage problem?
*Below is a screen shot of my Processes tab at idle in Task Manager (sorted in its CPU column by descending usage):
With my 40% CPU usage, there's also an odd change in the Details tab in Task Manager and I wonder if this is a clue.
In our other (10%-CPU-usage) Windows 10 Anniversary PCs, the total of the CPU column in Details tab is about 100% (due to rounding). In my 40%-CPU-usage PC, the total is only 73%.
*Below is a screen shot of my Details tab at idle in Task Manager (sorted in the CPU column by descending usage):
Thanks for any help you can provide