Hey, I know Windows and Computer in general wear down by time, but I had this "not too bad" computer BOUGHT only a year ago and it already feels like 4 gb Windows XP I had many years ago. The issue of it basically that usual everyday processes on the computer became not just longer, but they take a lot of power. For example just by opening Chrome browser with some links opened, it takes 80% of memory, not even talking about playing games.
I often see some random files with random names popping up asking to close them and in Task Manager, and my assumption is that I've got some kind of a virus and I don't know what to do, reinstall Windows or just UPDATE RAM or processor, I really don't know.
It's not just the internal problems, my monitor goes to sleep when I shut down my computer, but the computer still is on for another 5-10 MINUTES. It's very loud when I turn it on COMPARED how quiet it was a year ago, and I'm not a tech guy either, so I would be extremely thankful if someone from forum would advice me, thanks )

Here's some SPEC of mine
https://imgur.com/a/1PhaX