Can someone help me clean up my Dell Deminsions 3000. I want it to run like it did when we got it, but I don't want to restore it completely. There is only few files that I need to keep (Turbo Tax). Any advice?

There's a bunch of tips here: https://www.askmehelpdesk.com/computers-beginners/frequently-ask-questions-about-computers-233870.html