In three years how I got started in cryptocurrency tried about ten different stock exchanges and it seems I was lucky that I did not fall on those that have been hacked, is now in general use Binance and Bittrex
Even though you are lucky, always be careful to secure your assets. Avoid phishing websites, install paid antivirus, try bookmarking websites, and save your password in a safe place.
I don't think installing antivirus could help you avoid phishing sites nor installing virus on your computer. It actually making it worse. After all, antivirus devs are the people to work on creating viruses in order for their business keep on track. Probably bookmarking, remembering the domain(.com, .org, .ph and etc), being aware on news about the exchange might help and secure yourself from phishing sites.