I wouldn't get rid of it, I'd just disable it. No one single virus scanner can detect everything, so it's handy to have a few installed. Only have one as active though. You can use Bitdefender to run a manual scan a few of times a year. I recommend installing Avast. It's free and does a good job. You can get a paid version that has extra features but I've never had any issues with the free version.
I would also install the one that Stawka mentioned. It's also a very good one and free. Disable it and use it to run manual scans a few times a year. I also recommend Malwarebytes Antimalware. It's a free malware program and one of the best, if not the best, program of its kind. It finds and removes the trash that the virus scanners don't remove. It is updated very regularly. I run it once a month and update before every scan. It's also free to install and use.
I don't recommend Norton or McAfee. While they are both excellent programs, they are the 2 most commonly used scanners, so the virus creators create their viruses to be undetected by them, even when patches are created.
