I see no reason you would 'need' to install that unless you want to do it.
However, I would be very careful of that message you are getting. If your drivers are up to date, per the manufacturer's site, then something isn't right. While Windows Defender is for virus checking, it isn't really a deep scan program. You might want to consider something more serious. Which would still be free. Avast, AVG, etc. I would also suggest something like Spybot or other similar program.