X8 SLOW to save, open, etc. And unstable

I am so incredibly frustrated.  It seems the more I try to do what's been suggested in these forums (deleted MANY fonts,increased memory, etc), the worse the program becomes. 

I'm feel like I'm pretty adept at using the program, but not so much in changing things behind the scenes. I'm wondering if what I've done, was done properly?   Please, provide step-by-step instructions on what to change (font manager folder files, increasing virtual memory, etc) or direct me to where it is all located.

OS: Windows 10

Intel(R) Core(TM) I-77500 CPU @ 2.70 GHz 2.90 GHz

RAM: 16 GB

64-bit 

Samsung computer (bought new a few months ago because thinking my last computer was the issue!!!)

TIA