Firefox won't connect, but IE will, what do I do?

Firefox is not connecting to the internet no matter what wireless system I try. I recieve the basic "Unable to Connect" error message. I can easily access the internet through Internet Explorer though.
- I Use Windows 7 and have the newest version of Firefox
- I have uninstalled and re-installed Firefox
- I have set the Proxy to "No Proxy" and I have added Mozilla to my basic Windows Firewall
- I recovered my computer to when I didn't have this problem, nothing changed
- I haven't run special virus programs to check for Malware, but I had NoScript, AdBlocker and Ghostry for Firefox
- This happened after I updated Firefox
- I know I am not alone in this problem, but the other posts have no helped me
I believe that is all the information (that I can think of) that you will need about this problem. Any efforts are appreciated, and thank you for reading.

The solution for me was that Firefox and PCTools
adds some sneaky garbage. I went into control panel
add/remove programs and removed:
# "Browser Defender" (pctools)
# PCTools "AntiVirus Free"
# McAfee AntiVirus Free
Restart the computer and it works for me....
bc

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Firefox won't connect, but IE will, what do I do?

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