Firefox wont run says pc needs to restart to complete installation, it never does- same message when i try to uninstall

firefox will not open. when I try to uninstall it I get a message that says
PC needs to restart to complete previous firefox installation
but when I reboot I get the same message, I can not access Firefox in any manner

Glad it helped, <br>It probably would have been better to get to the root cause of the problem but if it is working again that is the important thing.
You could have problems at some later date, and one of the most important things is likely to be your collection of bookmarks. It will be worthwhile regularly making manual backups of those, and keeping them somewhere safe outside of the main firefox folders, if you ever need to do a full uninstall and reinstall, including deletion of old firefox data at least you will then be able to reinstate bookmarks. see [[Backing up and restoring bookmarks]]
As an example of what can easily go wrong, and an add-on recommended by another poster see [https://support.mozilla.com/en-US/questions/787020 thread] ''"I deleted by mistake bookmarks by uninstalling the previous version of Firefox beta 4.011b... Is there anyway to recover them?" ''
leading to http://www.pikey.me.uk/mozilla/#bb as a method of automatically backing up bookmarks and profile information.

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When I try to update Firefox it repeatedly says Firefox must be closed to proceed with install. I even get the same message when I try to uninstall the existing version of firefox. How do I close Firefox???

When I try to update Firefox it repeatedly says Firefox must be closed to proceed with install even tho Firefox is closed. I get the same message when I try to uninstall the existing version of Firefox. How do I close Firefox??? The same thing happens when I try to update other programs. When a program is off what else do I have to do to turn it off??

If you get an error message that you do not have sufficient permissions or have other problems with updating to update then easiest is to download the full version and trash the currently installed version to do a clean install of the new version.
Download a new copy of the Firefox program and save the DMG file to the desktop
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* Firefox 3.6.x: http://www.mozilla.com/en-US/firefox/all-older.html
* Trash the current Firefox application to do a clean (re-)install
* Install the new version that you have downloaded
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When I try to start Firefox, I get the error message "Your computer must be restarted to complete a previous upgrade of Firefox. Do you want to reboot now?" I have rebooted several times to no avail. Get the same message when I try to uninstall Firefox

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I am not able to install firefox as it says I need to restart my computer to update an older version

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If you have problems with updating then easiest is to download the full version and uninstall the currently installed version.
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* Firefox 3.6.x: http://www.mozilla.com/en-US/firefox/all-older.html
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Disk space and memory are two different things.
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OS X Lion: Remove files and folders from your computer
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* Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
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* http://kb.mozillazine.org/Profile_folder_-_Firefox

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Help

The iMacs covered in this forum were made before 2006 and have PowerPC processors. Those processors cannot support any higher Mac OS than 10.5.8.
If the bad forum lableing has led you here by mistake and you may have a newr processor, let's verify your machine's family. Please do "About this Mac" from your Apple menu. You will get a window like this:
Note the "Processor line (second red arrow):
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http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard
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I downloaded 3.6. It says must be re-booted, I re-boot and get the same message when it comes back.

I downloaded Firefox 3.6. It said to reboot computer, and clicked yes. It rebooted, and the icon that appears brings up the same box that says "needs to be rebooted"
I tied to uninstall and even get that prompt there as well.

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[discussion moved to Using Flash Player forum]

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Try here. Resolving Kernel Panics

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Firefox stuck in endless loop asking to restart to finish previous update but does nothing. Can uninstall or install newer version over it. I believe the setup files were erased before reboot by another installer. How do i fix this?

Anything i try related to firefix gets "Your computer must be restarted to complete a previous upgrade of Firefox" I have tried rebooting no luck, i have tired uninstalling from add remove programs or installing 4.0 over it. At the time I was try to upgrade from 3.0 to 3.6.15. I tried searching for the xpicleanup.dat file but no luck there.
Any suggestions to get firefox back up and running

I was having the same problem, so I deleted 'firefox.exe.moz-upgrade' from 'C:\Program Files\Mozilla Firefox' directory, as recommended. Now it no longer says it needs a restart to complete a previous installation. It says it needs a restart to complete a previous uninstall. What do I do now? Help!

Firefox wont run says pc needs to restart to complete installation, it never does- same message when i try to uninstall

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