If you really want to be safe:
Virus scanners are mostly useless.
Always keep your OS patched
Browse websites in a virtual machine
Don't download and run any programs unless they are 100% trustworthy and signed.
If you have enough money, have a dedicated inexpensive computer that you only use for banking and bitcoin, don't visit any other websites with it. No games, no apps, no programs. Turn off the computer when you're not using it and always keep it patched. Set LAN to public/untrusted mode, use hardline ethernet connection (no wifi). Keep firewall in router on. You should be pretty safe then.
Thanks for the advice I will most likely do exactly what you said when I get the money I will buy a computer and set it up just for my coinz. Also I was reading about virtual machines there are some free ones available to set up do you suggest I use those or is there a specific app for a virtual machine you suggest?