In fact, most antivirus programs don't do well on existing infections. The biggest is it doesn't do well if your computer is already infected with malware. There are some problems with using Bitdefender.
But it's enough to shield you when doing your most important business online. However, you do have a cap on how often and how long you can use it each day. You also get a VPN with Bitdefender, which is a pretty good and reliable one. There are extra protections so keyloggers can't watch what you're typing and steal your credentials that way. Bitdefender also includes a password manager to help you remember login credentials and create passwords that are hard for snoops to decipher.