High CPU Usage

I know this is a hotly debated issue as there are tons of threads on it, but I have been fighting my issue for over a year and have not found a solution.

I seem to do fine on Youtube, as they've upgraded to HTML5 seemingly, but there is one website that is very important to me and I cannot get a decent experience on this computer at that site: www.roll20.net  The problem, like so many others, is high CPU usage.  The total usage is 99 or 100, with the actual flash player using upwards of 70% of that.  I have the same problem on Opera, Firefox, Chrome, Chromium, and IE even though I refuse to use the last one, I did try it as a begrudging test. I have even dual booted with LInux Mint 18 thinking it was a windows problem but the same thing occurs.  Flash player does not play well with my computer for some reason and I'd like to know if there is anything I can do about it.  This problem does not exist on any other computer in our home, using the same network. Even my sons very old Vista box handled Roll20 just fine.

My specs are :

Processors: AMD E30 x2

RAM: 2G

graphics card: advanced micro devices Radeon HD 6310

I run both Win10 (for now) and Linux Mint 18

Most up to date versions of Chrome, Firefox and Opera

I also have a Win emulator running a win version of Firefox with the Shockwave Flash 23.0.0.162 installed

In Linux, I have my swap rate down to 10 but have not changed it in Windows (don't even know how lol)

I regularly clean my system with CCleaner and Glary's Utilities, and Malwarebytes anti malware.  I have used 3 or 4 other anti virus scanners and found nothing.

Lastly I do not believe this problem has been going on forever; if I am correct it happened about the same time I upgraded to Win10, and thus I blamed Micro$haft and searched for Win10 issues relentlessly but to no avail.  Then I installed Linux and the same problem occurs.  It has to do with Flash not liking my hardware for some reason but as I said, I don't think I had this issue going back more than 12 months or so.