hello bcop803, can you open firefox in safe mode by holding down the shift key while starting Firefox ?

i think you have xp with sp2 or sp3 because firefox can't run in xp or xp with sp1, Firefox 16.0.2 System Requirements

thank you

See also:

• http://kb.mozillazine.org/Browser_will_not_start_up

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

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