I have a HP Pavilion, windows 10, less than a year old. I can't figure out how to find what programmes are running in the background. I only use it for basic internet stuff but OH has used it for football sites, which I assume has caused the problem. I have stupid ads that pop up, football scores, people who are lonely and want to be my friend!!!
Probably best leaving the services alone but the Applications are fair game. You can easily restart them again. The services may be needed by the PC to run.