PS - Uninstall the other one before installing the one at my link above.

I had probs with the 'Renew now' link as well, I finally renewed successfully by going to:

http://www.avast.com/registration-free-antivirus.php#register-form I entered name & email addy (the original one that my expired Avast was registered with) to send new key to.

Received email: (although it says Avast 5 it worked ok for Avast 6)

Dear avast! user,Your registration of avast! free antivirus was successful. Your license key must now be inserted into the program.Your license key is:---------- cut here ----------WXXXXXXXXXXXXX-ASXXXXXXX---------- cut here –

If you are using avast! Free Antivirus v5.0, you will see an orange ball icon.** For users of avast! Free Antivirus v5.0 (orange ball) ** 1. Highlight the license key above, then right click on it and select "Copy" 2. Right click the orange "a-ball" in the bottom right corner of the screen, then left click "Registration information" 3. Click the "Insert license key" button at the bottom of the screen. 4. Right click in the empty Registration box then select "Paste" 5. Click "OK". Your license key is now inserted and the program can now be used free of charge for a further 12 months.

Job Done :)

morters

I've had a search and although I've seen others with the same or similar problems, I can find no tangable solution. You could always uninstall and reinstall FF.

What version have you got, I have FF 7.0.1, I don't have a problem.

Could it be Avast WebRep.I have that on add on's in Firefox but I have the paid version of Avast.

Maybe reinstall Firefox then install it again like Graphicool1 says.I suppose you would need to uninstall it completely which will also remove all of your favorites.