[@Gary] Unless you select your antivirus by clicking banner ads and trusting the first results in dodgy internet searches, reputable companies typically aren’t looking to install crap on your system. Your description sounds like something from 10 years ago. Slow down and read what’s on the screen during install instead of blindly clicking “Next” through to the end. Even the crappiest software these days allows one to opt out of changed home pages, search engines and add-on toolbars. If you have issues with things like that you only have yourself to blame for not being attentie and not doing your research.