Windows as delivered, is set up for a CORPORATE environment.

If you have an older PC you can use step 2 to shut off all kinds of services your don't need to run at home.

See task manager for a list of running processes.
(be sure to check 'show processes from all users')

Save ram and make your old PC run faster and more efficiently.

Just be sure to back up your OS before you start shutting things off, in case you shut off the wrong thing.