i think i have a browser virus
a few weeks ago I wanted to download adobe reader, mid download I decided it was taking too long so I stopped the download. I got a weird search engine that wasn't google, and was redirecting me to a safe search yahoo browser. I googled on my phone how to get rid of it and I seemingly did for the time being. Forward to recently downloading iOS Mojave, my MacBook is considerably slower and the redirection of the browser is back and this time I can't seem to get rid of it. I bought my Mac from a refurbishing company a year or two ago so I have no warranty or anything. Any ideas on how to get rid of the SafeFinder/Landslide search?
MacBook Air 13", macOS 10.14