I can't open Firefox at all, I always get the "Runtime Error!" message and never get a Firefox screen.

I've uninstalled and reinstalled Firefox a couple of times trying to fix this problem. Firefox worked in the past, but I haven't been able to reinstall it successfully since I had some repairs done that required a complete wipe of my disk and a complete reinstall of my operating system (Windows XP) and all software.

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
You can use "Disable all add-ons" on the ''Safe mode'' start window.
You have to close and restart Firefox after each change via "File > Exit" (on Mac: "Firefox > Quit")
See also http://kb.mozillazine.org/Firefox_crashes and [[Firefox crashes]]

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    Message was edited by: Charlie Morgan
    Message was edited by: Charlie Morgan

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