Google and other search pages Lock Up Browser (Firefox)

Hello,

This morning I received a message asking if I would like to use Mcafee Site Advisor as a default search to enable higher security. So I clicked yes, and from then on, anytime I got onto Google's main page, browser Firefox 4 Beta 8 locks up. After closing computer says forever that Firefox is still runing. It must be restarted every time.

Then I got warnings from Mcafee that Computer was "not protected".

I searched for updates and that got Mcafee fixed but was still having above problem with ANY search page, in both Firefox and IE Explorer.

I have Malware Bytes from a previous issue you folks helped me through. Should I start there?

Thanks,
Derek

Well for one, Mcafee is by far the slowest and thickest piece of software that I've seen from a Anti-Virus. So wha I suggest doing is uninstalling that and ether buy a new AV or get a free one. AVG is pretty good. I use it for casual browsing, but if you do more than that, you may want to have better protection.

If the uninstall does not work and you are still experiencing the same problem, I suggest ether using system restore to bring you back to the point of where your computer worked best.

Might I add that maybe you should do a scan and see if there is anything that could be causing the problem, such as a Trojan or Virus or even a Worm.