Hey all! Question for anyone who has ideas 
My 3.5 year old Dell Inspiron 15 7590 has an i7 chip, 16GB RAM, 512GB hard drive, and has had Linux Mint on it for almost a year.
Over the last few months it’s been acting more and more tired–running hot and loud. It freezes up sometimes where I can still see the screen, but I can’t move the mouse or use the touch screen. The only way to get back to what I was doing is to hold the power button down until it shuts off, which I know is not good for it at all. 
I am a fast, busy, multitasking type user that’s on my laptop a lot of the day for work and play. E.g., I’ll have a video playing while taking notes in a document, checking my banking, and/or playing a game of solitaire, two browsers and various little programs open (like a password manager), etc.
So, that’s my level of usage, but it was never a problem before, so I’m not sure what’s up.
At first I thought it was a one off glitch, but started noticing it more and more. So, I started watching the “System Monitoring Center” program to see if I could tell what the issue (a certain website, or program, etc) is, but nothing is standing out.
If I still had Windoze (boooo) on this laptop I would assume the OS was too heavy and that 3 years is as long as a laptop can handle a heavy, yucky system like that. I’d just sigh and go buy another laptop, but with Linux Mint I’d like to see if there’s a better way.
Perhaps the two years that Windows was on this laptop was too much for it? But again, it was running fine with Linux Mint for a solid 9-10 months, so I feel like it’s something else.
Any thoughts? 