Downloaded yahoo im, now firefox will not start

I downloaded yahoo instant messaging, so I can chat live with my sister. After downloading I tried to get back on the internet and firefox would not load but google chrome would. Are they not compatible, do I need to re-download firefox?

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For about a week now, Firefox will not start unless I re-install it, then it works for about a day and does the same thing. I have gone through all of the fixes

I am on the current Firefox version. I am running Windows 7 Professional with all current updates, and I run McAfee. As stated, I have tried all of the possible fixes your site discusses and have made sure McAfee is setup to allow Firefox full access. I am not sure what to do. Doing a reinstall fixes it for 12 to 24 hours. There is no message, just does not start and there does not seem to be a process running.

Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox and any leftover program files and then reinstall Firefox. Please follow these steps one by one:
#Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu) and confirm all upcoming messages.
#Now, uninstall Firefox by following the steps mentioned in the [[Uninstall Firefox from your computer#w_uninstall-firefox|Uninstall Firefox]] article.
'''IMPORTANT:''' On Windows, the uninstaller has the option to remove your personal data and settings. Make sure that you do '''not''' check this option; otherwise all of your bookmarks, passwords, extensions, user customizations and other Firefox [[Profiles|user profile data]] will be removed from your computer.
After uninstalling Firefox on Windows, delete the "Mozilla Firefox" program folder, located by default in one of these locations:
* '''(On 32-bit Windows)''' ''C:\Program Files\Mozilla Firefox''
* '''(On 64-bit Windows)''' ''C:\Program Files (x86)\Mozilla Firefox''
#Go to the Windows Start menu and click on "Computer".
#In the Explorer window that opens, double click Local Disk (C:) to open the C:\ drive.
#Find the "Program Files (x86)" folder or "Program Files" folder.
#* On 32-bit Windows, double-click the '''Program Files''' folder to open it.
#* On 64-bit Windows, you will see a "Program Files (x86)" folder AND a "Program Files" folder. Open the '''Program Files (x86)''' folder.
#Look for a '''Mozilla Firefox''' folder. If you find one, right-click it and select ''Delete'' and confirm that you want to move the folder to the Recycle Bin.
Now, go ahead and reinstall Firefox:
#Double-click the downloaded installation file and go through the steps of the installation wizard.
#Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back to see if this helped you!

Tried to install ff4 got message "your computer must be restarted to complete a previous upgrade of firefox. do you want to reboot now" I rebooted computer now firefox will not start at all and i have tried to uninstall and get the same message

have also tried to reinstall older version of firefox and get same message

i have been trying to figure out how to fix this same issue as well for the past 2 hours or so. it is very upsetting that you can't even uninstall it try to redo it all or just use the old version. everything seemed to be ok untill i got to the set up part of the process that is when i kept getting the same message: ''your computer must be restarted to complete a previous upgrade of firefox. do you want to reboot now" and to no avail. please help. i really enjoyed my firefox/mozilla. now i can't even use it i have to go back to internet explorer for now...........

Firefox will not start, after reboot.

For a few months now Firefox will not start after I reboot my computer. In order to get it to start I click the exe then must go into task manager kill it, click the exe again, kill it again then, from there it will typically start, but sometimes it may take one or two more trys. When clicking the exe firefox will appear in the task manager under processes but will will start with ~7% CPU usage, then quickly drop to zero every time until it does actually open and start. I have ran a full system recovery and started anew after reinstalling mozilla several times failed to fix the problem. I run virus and spyware checks often and come up clean, and also run Chrome as a default browser.
== This happened ==
A few times a week
== Around the time 3.5 was released

Hello Tom.
You may be having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not coming from one of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] and select ''Disable all add-ons''. If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and theme. You can troubleshoot plugins the same way.
If you want support for one of your add-ons, you'll need to contact its author.

I click on the icon and firefox will not start or try to start

I installed Avery labels and then had trouble with tool bar remover avery but now firefox will not start up when i click on icon. I removed Firefox and reinstalled but will not run.
== This happened ==
Every time Firefox opened
== 5/19/2010 ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; FunWebProducts; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; msn OptimizedIE8;ENUS)

It sounds like you may have a problem caused by an extension (maybe that avery toolbar)
[[Troubleshooting extensions and themes|Try the instructions in this article]] - begin by putting Firefox in Safe Mode. If Firefox will start in safe mode, continue with the section [[Troubleshooting extensions and themes|#Disable_all_extensions|Disable all extensions]] and then [[Troubleshooting extensions and themes|#Test_for_faulty_extensions|Test for faulty extensions]]
I hope that helps. Let us know if you can.

After downloading an update, firefox says "your computer must be restarted to complete a previous upgrade of firefox. do you want to reboot now" and will not start.

Firefox will not start, or allow windows xp to uninstall the program. When I attempt to start the program, firefox says "your computer must be restarted to complete a previous upgrade of firefox. do you want to reboot now? It gives the same message after rebooting, and will not start, or uninstall. I also downloaded it again, same thing.
== This happened ==
Every time Firefox opened
== I downloaded an update.

Follow '''''cor-el's''''' advice in this post:
https://support.mozilla.com/en-US/forum/1/606173

Firefox will not start after I downloaded the newest version

Firefox used to work on my computer but will not start now that I have downloaded the newest version.

See [[Firefox will not start]]
If you issue is resolved by this post please click Solved it! so we can assist others.

I upgraded from 3.6.13 to Beta 4.0 and now Firefox will not open at all I tried to uninstall to start again but it will not uninstall either it does nothing.

I uninstalled Beta 4 and re-installed 3.6.13 now Firefox will not open at all I tried to uninstall to start again but it will not uninstall either it does nothing, I have been using Firefox for a long time but cannot resolve this problem can anyone help and give me a solution please. As I use Firefox as my web browser it is very frustrating.
The fact it will not uninstall appears to be something completely new as nobody I know who uses Firefox has ever encountered this in the past.

Did you check your security software (firewall)?
A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox 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.
See [[Server not found]] and [[Firewalls]] and http://kb.mozillazine.org/Firewalls
If necessary then also see:
* http://kb.mozillazine.org/Browser_will_not_start_up
* http://kb.mozillazine.org/Error_loading_websites

I was told I had to upgrade Firefox to 4.0, downloaded the dmg, launched it and now Firefox will not open at all.

I was told I had to upgrade Firefox to 4.0, downloaded the dmg, launched it and now Firefox will not open at all. It tells me "The operation can't be completed because you don't have permission to access some of the items." Also, that "Firefox cannot be opened because of a problem." And it give a bunch of code. This is my main browser. What is happening here? My OS X is 10.6.7. Has this caused a problem?

If you right-click on your Photoshope.exe, select Properties, there should be a Compatibility tab. There you can select Windows XP, Windows 2000, Winows 98 or 95. One of these should allow you to open Photoshop 6, unless you mean CS6.

Just downloaded new update 7/.1 and now firefox will not connect

Just downloaded the latest update 7.0.1. Restarted computer now firefox will not cponnect. IE will Thinderbird will. Turned off firewall and tried no luck so not firewall blocking it

A possible cause is security software (firewall) 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 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.com/kb/Server+not+found
*https://support.mozilla.com/kb/Firewalls

HT5654 Just tried 3 times to update iTunes on my PC running Vista. There was an error. It stopped the installation. Now iTunes will not start at all. The error message tells me to reinstall which I tried but did not work. What should I do?

Just tried 3 times to update iTunes on my PC running Vista. There was an error. It stopped the installation. Now iTunes will not start at all. The error message tells me to reinstall which I tried but did not work. What should I do?

Hello, Jdragone.
Thanks for the question. Start with completely uninstalling iTunes and all of it's components in the order specified in the article below. Once this is done, download and install iTunes.
Removing and reinstalling iTunes and other software components for Windows Vista, Windows 7, or Windows 8
http://support.apple.com/kb/HT1923
If you receive any errors when uninstalling any components of iTunes, try the steps in the article below for each component that gives you an error.
"The feature you are trying to use is on a network resource that is unavailable" alert appears when removing Apple software in Windows
http://support.apple.com/kb/TS3704
Cheers,
Jason H.

Firefox will not start at all

New versions of Firefox will not start and only bring up the crash reporter. I've tried starting in safe mode, I've deleted/created new Profiles and I've uninstalled/installed Firefox over and over. I can still download 28.0 and it has no problem opening. Below is the latest Crash ID from 35.0
Crash ID: bp-4ac8fb2d-9a2a-4a6a-a9e4-06cc42150125

hello sid.robinson, this crash is caused by the "Digital Guardian" software by Verdasys that is running on your computer. Please see if there's an update available for that program.

Firefox will not start and I get firefox.exe Application Error with the code 0x00000000, I've tried reloading but always get the same error message!

Firefox will not start, I've tried opening in safe mode, no joy. I get the firefox.exe application error 0x00000000
== This happened ==
Every time Firefox opened
== Possibly after a windows update ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; YPC 3.2.0; .NET CLR 1.1.4322; InfoPath.1)

Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

Firefox will not start after updating to version 7.0

Mozilla Firefox automatically updated itself to 7.0. Now, Mozilla will not start on my computer. It shows that it is running in task menu- processes... but not in Applications.

A possible cause is security software (firewall) 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 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.com/kb/Server+not+found
*https://support.mozilla.com/kb/Firewalls

Firefox will not start after computer restart

Install Firefox, runs fine. Restart computer, Firefox will not start or finally when it tries to start script errors occur. If I reinstall Firefox after a computer restart, it will work fine, again when the computer is shut down the next time it is started, will not be able to use Firefox. Firefox will not start up in Firefox safe mode, will not start in windows safe mode. Not add on's, nothing added, just the Firefox installer Performed complete system restore on the computer, same problem. Windows 7 Pro. Remove Firefox from windows control panel, restart computer, install firefox, will run. turn off computer, turn on computer, firefox will not start or freezes. I am interfacing the internet via Explorer now.
I have reinstalled Firefox so it will run in order to perform the steps requested below.

Try this
*https://support.mozilla.org/en-US/kb/firefox-wont-start-find-solutions
Open TaskManager, if it running '''firefox.exe''' > end all processes
Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.
You can try these free programs to scan for malware, which work with your existing antivirus software:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility]
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article.
Did this fix your problems? Please report back to us!

Downloaded yahoo im, now firefox will not start

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