A couple related questions:
Looking in Activity Monitor, I find the following:
VShieldScanner PID 83 - started by launchd PID #1
VShieldScanner PID 74256 - started by VShieldScanner PID 83
VShieldScanner PID 74255 - started by VShieldScanner PID 83
VShieldScanner PID 74254 - started by VShieldScanner PID 83
The first instance regularly sits at 0% CPU.
The other three instances run continually and show 10-40% CPU even when no user activity is occurring on the system.
Macbook Pro Retina
OS X 10.11.6 (15G1217)
McAfee Endpoint Security for Mac 10.2.1 (2632).
Threat Prevention 10.2.1 (6168)
Yes it is common to have more than one cshieldscanner process running.
I can't remember the reasoning right now, but one of the product team have answered this in the past. I'll try and track down the thread and add it here tomorrow.
I'm having this same issue. It doesn't appear that this user's post was ever resolved. I have three (3) separate VShieldScanner processing running taking up a total of around 2.1 GB of memory. Here are my system specs:
iMac (27-inch, Mid 2011) / 2.7 GHz Intel Core i5
20 GB of Memory: 1333 MHz DDR3
Sierra Version 10.12.6
Total Protection Version: Unknown - times out when I launch to get the version #