Malware, Spyware and Adware are really NOT a factor in the equation.
I've done 3 Windows Reinstalls since the problems started.
And I checked my Flash Drive with avast, SAS, MBAM and it came out clean.
For whatever reason, it's worked a lot better yesterday and today versus the beginning of the week.
A while ago I even opened it up, took out the CPU Fan and cleaned thoroughly with WD40. I carefully dried it out with compressed air. And I lubricated it. It had started getting a little noisy again. At first I was afraid to power down the computer. I was, "MAN! What if after I power it down to clean and lubricate the CPU Fan, then it won't Boot Up?"
But, while the noise was not yet horrible, it was annoying me. So, I decided, "What the heck. Power it down and take care of that Fan."
Now it's quietly humming and the computer is so far running fine.
Hopefully SOMEHOW the CHKDSK I ran this morning helped it.
Since the question in my Topic Title has been answered, I'll consider this topic RESOLVED.