 on your pc open the task manager on a mac you're going to open activity monitor then there you're going to see all the apps and background processes that are running on your computer look through the list now if you see a name that you don't recognize just search for it online to see what turns up but let's say that you do see spyware on that list you need to remove it and that may mean oh i know it's a lot of work backing up your system reformatting the drive reinstalling everything definitely no fun at all