Conduit, AVG, Babylon Virus

Hi all, I recently tried downloading Mozilla Firefox last night, and with it, I seem to have picked up some sort of virus.

Now, every time that I start Google Chrome, four tabs automatically open up as my home page. Each tab is, respectively, Conduit search, AVG search, Babylon search, and AVG search again.

I'm pretty sure I've tried the basic stuff like uninstalling Conduit Safe Search from my computer (AVG and Babylon were not found in my computer), changing my settings in Chrome like changing my home page and deleting all search engines other than Google. This works for a while, but after restarting the computer, I'm back to square one. I've even run MalawareBytes and adwcleaner to no avail.

I use Windows 8 on a Lenovo laptop, if that makes a difference.

PLEASE help me!