Let me just start by saying hi, haha.
I've been using my mother's computer for the past few days and I expected some simple virus and malware issues that I could resolve via Google and using this site's guides, but I've reached a bump in the road with something that continues to make every page I visit into a "Reported Attack Site" warning on Firefox http://imageshack.us/photo/my-images/23/ffsnip.jpg/
Other times it will just give a warning bar like this: http://imageshack.us/photo/my-images/847/iesnip.jpg/
Clicking on any of the links on the "Reported Attack Site" warning page will lead me to a System-Defence.com
I used Malwarebytes to try and fix the problem, but it only removed the fake System Defense program that popped up on my desktop and told me to purchase the full version of that software. My browsers still suffer from this, however.
I'm running Windows Vista.
Thanks in advance!