Mozilla Firefox Won't Start

I installed Mozilla Firefox and it won't even start up.
I removed it and re-installed it and it won't even start up. When you ever you double click the Icon (execute it) it does'nt work.
I currently use IE7 with all the updates.

What do you suggest. This is important to me so I'll put 375 points.

Many Thanks
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Hello Treadstone21,

1. An addon may be interfering with IE. Disable Addons.  Start IE in No Add-ons mode, either by right-clicking the Desktop icon, or clicking START | RUN and typing: iexplore.exe -extoff

If Firefox can open, go to Tools > Add-on Manager, and uncheck the addons.  Then put back one at a time to see which addon is the culprit.

2. Reset IE settings.  Go to Tools > Internet Options > Advanced.  Click on "Reset" button. Click OK. Close all browsers. Reboot the computer.

3. Check if a program running in the background is interfering with Internet Explorer. Temporarily disable antivirus, firewall, antispyware, ad-blocker, popup blocker, and all Norton programs.

4. Uninstall and reinstall IE7. Make that antivirus and other security programs are turned off in the background.

Make sure you have the latest updates.

Hope this helps!
Marc ZCommented:

A little more information might help us pinpoint your issue, also.

What Operating System are you running?  
What Security programs dod you have installed on this machine?
Have you EVER had Firefox running successfully on this machine?
When you installed Firefox, did you Import settings from IE?  I would not.

When you installed Firefox, were you running as an Admin? And did you then Run it at least once, as an Admin of the computer?

Most importantly, is this YOUR machine or a Work Computer?  Some companies have tried to prevent Firefox from being installed on theri machines.

Are you having issues accessing the net on IE at all?
Have you checked this machine for virus/malware?

See until we get back to you.
Treadstone21Author Commented:
I tried what war1 suggestion and it did'nt work, unfortunately.

I am running Windows XP Home service pack 2.
I have AVG spyware and ativirus (free editions). I had spybot and avast running at one time.I also have cc cleaner runnig, it runs at sart-up.

Yes a had Firefox running successfully on this machine at one time. I a imported IE setting. Funny thing is it did ask to import any settings recently.

Yes I was an admin at the time and successfully used the webrowser.
This is my personal machine and I ran spybot, avg (both) avast and cc cleaner.

I hope this helps
Cloud Class® Course: Python 3 Fundamentals

This course will teach participants about installing and configuring Python, syntax, importing, statements, types, strings, booleans, files, lists, tuples, comprehensions, functions, and classes.


I gave you th directions for IE7, not Firefox.  Try these suggestions.  You may have to perform steps 4 or 5 to fix the problem. Try the other steps first.

1. Check if an addon is interfering.  Go to Tools > Addons and disable the addons. Click OK.

2. Check if a program running in the background is interfering. Disable firewall, antivirus, antispyware, spam blocker, and desktop programs.

3. Clear your cookies and cache files. Go to Tools > Options > Privacy tab. Under Private Data, click "Clear Now" button.  Click OK.

4. If no joy, your profile is corrupt. Create a new Firefox profile

Then migrate your settings to new profile

5. If no joy, back up your bookmarks.  Uninstall Firefox and delete your Firefox profile files.  Then do a clean install of Firefox.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Marc ZCommented:

War1 is most likely correct.  A new Profile is in order.  Uninstalling and reinstalling Firefox does not effect your Profile, which is why it did not ask you to import from IE.  If an install of Firefox finds an existing Profile, then it uses it, without creating a new one. But if you have a corrupt Profile, Firefox does not know that and tries to use it, which would explain why removing Firefox and reinstalling it had no effect on the browser.  Basically when Firefox is installed, the program is installed to "Program Folders", but the preferences of the user are set to the "Profile Folder" typically located in the Documents and Settings directory.
See for more info regarding it.

Although the Standard Diagnostic I pointed you to should have had you create that New Profile.

Let us know if you have any more questions or problems.
Treadstone21Author Commented:
OKk, I'll try that and let you know.
Treadstone21Author Commented:
war1 - you are a Bad Boy!
I could'nt even get to create a new profile. Nothing for Mozilla would start.
So I uninstalled it and deleted everything for firefox (expect other programe's extentions) and re-intalled it and that did the trick.
Thanks man!
Treadstone21, glad the problem is fixed.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Web Browsers

From novice to tech pro — start learning today.