BleepingComputer.com: All Internet Browsers Crashing

I've been having some trouble with my internet browsers crashing (Firefox, Opera, Chrome, IE). It doesn't matter which one i use, but after about 10-15 minutes of browsing the web they inevitably crash and i have to restart them.

I have IObit Security 360 that i run everyday. I have AVG 8.0 that i run weekly, but it is NOT running constantly in the background. I also have StopZilla installed. I've installed and ran Malwarebytes and just about every other free antivirus, anti-malware, and anti-spyware software there is. Nothing has come up.

I have an HP Pavilion dv6000 Laptop running 32-bit Windows Vista Home Premium.

I've cleared out all of the cookies, history, etc., as well as disabled all the add-ons for Firefox. I've tried re-installing Firefox, but i feel like that isn't the sole problem because all of the browsers are crashing. There are no toolbars installed and running. Firefox also crashes in Safe Mode.

My windows software is up to date.

I'm really just getting frustrated in the fact that often times i will lose the pages i'm viewing. I don't know what else to do but i'm open to any suggestions. Thanks!

WOT and hp hosts rate Stopzilla in not a good light.I would remove it asap.Download Superantispyware has you have tried malwarebytes,sometimes a alternate scanner may pick up something.Download from www.superantispyware.com.Run a quick scan wich takes a while longer than malwarebytes.Then either delete or quarantine what you find.There is also a sqared free.Download from www.emsisoft.com.Its another free on demand scanner and see were you go from there.