That is a bit much.
right click start button
choose powershell (admin)
type
SFC /scannow and press enter
once its completed, copy/paste this command into same window:
Repair-WindowsImage -Online -RestoreHealth
and press enter
SFC fixes system files, second command cleans image files, re run SFC if it failed to fix all files and restart PC
have you done a restart? (not turn off PC, i mean user Power menu in start and choose restart)
is that what its like at boot?
Download
Process explorer and run it as admin (it comes from Microsoft so its safe). It shows way more info than task manager can
the default view is tree structure meaning like your task manager screen, it will show what processes are under each service, but unlike task manager, it shows the ram usage of each part so you can see what is eating your ram. it may show what is running under explorer
this is what is running under explorer on my PC.
Private bytes = Ram + page file usage
Working set = actual ram usage
This page shows what all the colors and headings mean, link at bottom of it shows how to use it to find problems.