Affiliate Marketing Secrets

I am worried about my computer getting hacked. Is there any way anyone can hack me without me having to click a link or open a tainted email?
I never click on emails and I only visit safe websites. I have a malware scanner and I run once per day plus anti virus and I have all of my internet settings on high alert. I am also using Firefox.
Can people hack you and access your files without you having to click something?

Hi there,
I just develop a concept for my website.
You may visit it at scannershandheld.net
basically it is an affiliate site which promotes products right from amazon.
I would like to have some ideas how to promote the products.
Thanks to all who has some knowledge about this product.