One thing I'm going to say about the task manager is if you don't know what the process isdont delete it.
Lets say you have a process you think is malware or something you don't want.
You go to the file location through the task manager and go up folder levels until
you find out what program it is and decide if you want to uninstall it.
If it isn't a program that you can uninstall.
Now you can end the process with the task manager and use the computer for a while
and see if it works normal.If after ending the process the computer doesn't work
restart or cold boot(kill the power and restart).The process will come back on.
If after ending the process with the task manager the computer seems to work normal now you can delete the
process to the recycle bin at the process file location. Now restart the computer
and use it for a month and see if it works normal, if it does you can empty the process
from the recycle bin. If the computer doesn't work normal restore it from the recycle bin
Microsoft won't let you easily delete some of the operating system
files in new versions of windows, But if it is malware you can probably get rid of it.
With some things you can just turn them off in the options for the program if you
don't want to waste resources.