Firefox won't start, and I cannot download the new version as it keeps saying 'unspecified error' when I try

Question

We (my wife and I) downloaded the new version of firefox, but found that it was being very jerky and slow and just didn't really like how it looked. My wife did a system restore on our computer to see if that helped, and since then firefox hasn't started at all - if we double click on the icon, it looks like it's doing something and then it just doesn't open. Whenever I try and download it again it comes up with 'unspecified error'. I've tried deleting all the firefox program files from my computer first, but there is one file in conponents that it won't let me because I need administrator permission. It doesn't seem to make any difference anyway.

Answer 1

Using "System Restore" can cause your Firefox installation to get corrupted because not all files are restored (only files in a white-list), so be cautious with using System Restore.<br />
You need to (re)install software that was affected.<br />
Remove the Firefox program folder (C:\Program Files\Mozilla Firefox\) before reinstalling a freshly downloaded Firefox copy to do a clean install.
You can find the latest Firefox release in all languages and for all Operating Systems here:
*Firefox 11.0.x: http://www.mozilla.org/en-US/firefox/all.html
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls