My home PC platform is Microsoft Edge 10 and current "No Data Tracking" browser is duckduckgo. On the PC I continuously run "Ad Blocker" and "Avast Free Antivirus". I rarely use, but have it to run, "Spyware Blaster" and "CCleaner", generally detecting nothing. All of these are Freeware.
Once in a while, if the PC seems slow, or sites load wrong, use SHIFT-ALT-DEL simultaneously. Clear cache, cookies, and history, then reboot. These are the "infamous" IT tools recommend as the first attempt to solve most PC problems.