Does Linux NEED an anti-virus?

Will it burn music CD's?

Mostly we surf the internet, write list e-mails (such as this) and
burn music CD's.

I goof around at YouTube some.

That's about it.

I just NEED a really SECURE computer, as we've wasted about $4,000.00
on 6 PC's that are now trash from being hacked.

Do you know of THIS company, are they reliable?

http://www.zareason.com/shop/home.php