These days are long passed.. You're only a bit lucky that Windows is market leader, aint much of a ransom to get from the much smaller mac community.
That was the main reason why Aplle always thought it couldn't be breached or wasn't vurnerable to viruses. But it was more like the hackers didn't have the intrest to put much energy in it.. But already some years ago saw a video of a Las Vegas, Black hat / White hat convention where two 13 year old wizz kids publicly on stage hacked a Mac in 10 seconds installing several backdoors.
🙂
Bottom line never trust any network device regardless the OS, they all are potential leaking sieves. Always store sensitive valuable data on a external USB drive and not on the network or computers hard drive.. Only plug it in when you need to.
🙂
AV programs are like the Police, always running after the facts.. First came the crime or virus or back door program, after that the law and need for a program against it. So they are in fact always a step behind, you firstly need to discover the leak before you can patch it.
Thus even with an AV program you may consider yourself the lucky one if not beeing the first infected victim to discover there is some new nasty roaming the net the AV can't yet catch.
But still it realy aint something to worry much about.. I haven't had a vuris nor any spam in over 10 years. You just need to learn what sites to stay away from and what not to do to prevent it.
Few simple things what not to do.
Free Porn

Aimed towards the instinctively driven dirty old man clicking everything that moves.
Free Games

Aimed towards instinctively driven children impatiently clicking 10 times because it doesn't run fast enough.
Free E-cards

e.g. Valentines day..
Honey I love you 
and they will

you, thanks for the e-mail adresses.

If not installing a back door..
Opening attachments from unknown sources.
Take several e-mail addresses, 1 for personal use e.g. bussines family, freinds. 1 for forums and other internet fun stuff. I use the e-mail adress i got from my provider exclusively for personal contacts. Free Gmail account for forums and Free Microsoft live account for websites i yet do not trust asking for an adress. The only account i recieve spam is the M$ live account and i do not care there aint nothing important on it anyway.
I worked in the IT for several years and privatly fixing a lot of infected computers for friends and family..
😉 I know where to look to see where they got it from. Sneaking through the history and temporary internet files.. In most cases it were the kids surfing free games like crazy and in more cases than i thought it was dady himself hunting hooters in spare time..
