Private Working Set?

[The Texican-PG-]

Having a really bad day with my computer. Mouse stops and computer freezes for a few seconds then goes on as normal. Mouse pointer changes from arrow to I-beam then back to arrow.
Went into Task Manager to see what was running in processes and noticed the tab saying "Private Memory Set"..... wtf is that? Googled but not making any sense to me.

[Red Dog-PG-]

There are two main types of memory usage: working set and private working set. The private working set is the amount of memory used by a process that cannot be shared among other processes, while working set includes the memory shared by other processes.

I do not think that is causing your mouse issues