Many background processes are related to programs you are running all the time, software and other programs OS runs. BUT unfortunately, there is a lot of malicious files that can use your CPU and appear in the Task Manager as running in the background. I would advise you to fully scan your PC with anti-malware or alternative malware fighting program so you can see which ones are safe and which ones are not.
You can also manually check the location of the concerning file. And then you determine if it is essential or not