Launch Firefox & message "The update could not be installed. Please make sure there are no other copies of Firefox running on your computer & then re-start Firefox again, But I don't have other copies running.

Launch Firefox & message says update couldn't be installed. Check no other copies running, but none are

Upgrade your browser to Firefox 8 and check
* getfirefox.com

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ERROR MASSAGE- "The update could not be installed.Please make sure there are no other copies of Firefox running on your computer,and then restart Firefox to try again".

"The update could not be installed.Please make sure there are no other copies of Firefox running on your computer,and then restart Firefox to try again"this kind of error massage i found but there are no other copies of Firefox running on my computer.So please solve my prob.I can not uninstall this because i have saved important bookmark on my system.When i start my Firefox that time browser is opening few times later may be it's my internet slow connection but everyone has slow connection internet they are not having this prob then why should i have this prob.Why it is taking little bit time to open?after that update prob when i installed the update file.

Firefox [[Safe mode]] is a diagnostic mode that allows troubleshooting. 
You start the same version, only some features are disable like add-ons (Tools > Add-ons > Extensions).
See http://kb.mozillazine.org/Software_Update (Software Update not working properly)
Remove the files in the updates and updates\0 folder:
C:\Users\<user>\AppData\Local\Mozilla\Firefox\Mozilla Firefox\updates
(%LOCALAPPDATA%\Mozilla\Firefox\Mozilla Firefox\updates)
C:\Users\<user>\AppData\Local\VirtualStore\Program Files\Mozilla Firefox\updates
* 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.
* Don't remove personal data when uninstalling.
* 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.

ERROR MASSAGE-"The update could not be installed.Plase make sure there are no other copies of firefox running on your computer,and then restart firefox to try again".

<blockquote>Locking duplicate thread. 
Please continue here: [[/questions/870411]]</blockquote>
"The update could not be installed.Please make sure there are no other copies of Firefox running on your computer,and then restart Firefox to try again"this kind of error massage i found but there are no other copies of Firefox running on my computer.So please solve my prob.I can not uninstall this because i have saved important bookmark on my system.When i start my Firefox that time browser is opening few times later may be it's my internet slow connection but everyone has slow connection internet they are not having this prob then why should i have this prob.Why it is taking little bit time to open?

Thanks for the info about Trojan. It may be the problem. Meanwhile I went to Admin/Owner side and did some cleaning -- including trying to reload my Favorite/Bookmarks that have always carried forth from previous levels of Windows XP and earlier.
The new computer here did not grab the Bookmarks from the previous, and yesterday I thought I had them loaded, and today went to Worker-Bee side and they are not showing.
About those add-ons... I have no idea, but think I got everything up to date yesterday. I will look at your earlier reply tomorrow or this weekend when I have more time at home to learn from it.
Thank you for your time in helping.
Late here, heading to sleep. Marilyn

When I try to open Firefox I get a message: "Update could not be installed. Make sure there is not another instance of Firefox. Restart and try again."

Started w/FF 29 something.on Win XP (Home) SP3
Verified w/Task manager and PS that there is no other instance of FF.
Occurs only in my profile, administrator and other users do not get this message.
First Resetting, did not work.
Safe mode also did not work.
Uninstalled completely, even deleted the Firefox folder from my profile and rebooted.
Downloaded new versions, installed and same issue.
Firefox now version 33, all seems up to date but I still get that message. When I open Help > About it says I am at version 33 and to restart to upgrade...
Any ideas greatly appreciated.
Have reverted to SeaMonkey for now.

Hello sprytely, go for a clean re-install, this means you '''remove Firefox program files''' and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from the next full installer https://www.mozilla.org/en-US/firefox/all/ and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
#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.
More information about reinstalling Firefox can be found [[Troubleshoot and diagnose Firefox problems#w_5-reinstall-firefox|here]].
WARNING:Do not use a third party uninstaller as part of this process. Doing so could permanently delete your [[Profiles|Firefox profile]] data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be easily recovered unless they have been backed up to an external device! See [[Back up and restore information in Firefox profiles]]. 
Thank you.

Update could not be installed. Make sure no other copies are running. Same over and over.

Firefox keeps trying to install update. Message: Update could not be installed. Make sure no other copies of Foxfire are running then restart FF to try again. Repeats same message over and over.

See http://kb.mozillazine.org/Software_Update#Software_Update_Failed._The_update_could_not_be_installed

I keep getting the foloowing error." the update couldnot be installed. please make sure there are no other copies of firefox running on your computer and then restart firefox to try again". i tryed to reinstall but no help.

error." the update couldnot be installed. please make sure there are no other copies of firefox running on your computer and then restart firefox to try again".

You already appear to be running the latest Firefox 7.0.1 version, so there should be no need to update.
*http://kb.mozillazine.org/Updates_reported_when_running_newest_version

Update could not be installed pls make sure no other copies running

I have version Firefox 10.0 and it is trying to update to 10.0.01 but msg states update could not be installed. Please make sure no other copies of FF are running. I had this problem before V10 was updated and re-installed FF at that time. Why does this continue to happen. I tried restarting and Run as admin but nothing works.

Hi,
Please try deleting the '''parent.lock''' file in the [http://kb.mozillazine.org/Profile_folder Firefox Profile Folder]. You can also open this folder via Firefox '''Help''' ('''Alt''' + '''H''') > '''Troubleshooting Information''' > '''Open Containing Folder''', and exit Firefox.
[http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Files]

My auto update is failing. I tried reboot and run as admin, but did not help. I get message: The update could not be installed. Please make sure there are no other copies of Firefox running on your computer, and then restart Firefox to try again.

I followed the instructions on the support page. I did a Windows restart. I cannot see how other copies of Firefox could be running. No other apps have been launched and Task Manager only shows one copy of Firefox and no other apps. I have tried several times and always get the same result.

Firefox [[Safe mode]] is a diagnostic mode that allows troubleshooting. 
You start the same version, only some features are disable like add-ons (Tools > Add-ons > Extensions).
See http://kb.mozillazine.org/Software_Update (Software Update not working properly)
Remove the files in the updates and updates\0 folder:
C:\Users\<user>\AppData\Local\Mozilla\Firefox\Mozilla Firefox\updates
(%LOCALAPPDATA%\Mozilla\Firefox\Mozilla Firefox\updates)
C:\Users\<user>\AppData\Local\VirtualStore\Program Files\Mozilla Firefox\updates
* 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.
* Don't remove personal data when uninstalling.
* 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.

My 3.6.14 keeps trying to update and gives this error message:"The update could not be installed. Please make sure there are no other copies of Firefox running on your computer, and then restart Firefox to try again."

My OS is Windows XP version service pack 3. I even tried to install FF4 but it never get installed. As I mentioned my FF keeps trying to update itself but it gives the error message I provided in title. Now I don't have access to my FF browser and my life is stopped because I have all my passwords saved on FF. I restarted my notebook but it stills try to update itself giving the same error message. I can not also upgrade my Adobe reader 7.0.7 to 10 I have tried more than 10 times but it never gets upgraded. I had this Adobe problem since long time ago.

Run the Firefox program once as Administrator (right-click: Run as Administrator). 
If that doesn't help then do a clean reinstall.
Do a clean (re-)install:
* Download a fresh Firefox copy and save the file to the desktop.
* http://www.mozilla.com/firefox/all.html
* Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
* Don't remove personal data if you uninstall the current version.
* 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.
Your bookmarks and other profile data are stored elsewhere (not in the Firefox program folder) and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.

"The update could not be installed" message

Every time I start Firefox I get a dialog box with this message:
The update could not be installed. Please make sure that there are no other copies of Firefox running on your computer and then restart Firefox to try again. [OK button]
I click the OK button, the box disappears, then Firefox starts up.
It's annoying. I have tried updating Firefox in the Admin account on this computer, but even that has not worked. Why might this be happening, and what can I do about it?
PS I don't do online forums, if you are a "Firefox expert" answering thsi question, by all means post the reply on the forum, but please also email it to me at my registration address. Thanks.

So this is rapid updating? I had to stop using V5 because of problems. V5.01 did improve things. FF was still my default browser so I did get to follow the upgrade to V6. Now the suggestion that completely removing it and editing the registry will enable me to see if V6 is worth having. Please, this is not rapid. This is the kind of problem that stopped me using Norton, having to deal with more issues that actually using the software.
No doubt I will attempt this sometime, by then though I may have just got used to Chrome [yuk]. It is not a good sign that being more news worthy is better than having a working product. I'm a web and app developer and it has served me well until V4 now it is just getting in the way and Mozilla seem to think that just one more rapid release [with problems like this] may just solve the problems.
I think not after all I'm still waiting for MS to fix things that should have been better 10 years ago.
I removed my current version. I check that the folders were gone. I reinstalled. I got an error:
Error Platform version '5.01' is not compatible with minVersion >=6.0 maxVersion <=6.0

"The update could not be installed." What do I do???

I've asked this before, and there doesn't seem anything I can do to get the update feature to perform correctly. I keep getting the message "the update could not be installed." I've removed the program and reinstalled it, tried deleting the update folders and files, all to no avail. This is the last time I'll try to fix it. If I can't get the update to work I'll permanently unistall Firefox and use another browser. This bug hasn't been fixed, and keeps failing with every new update.

I too have this problem again. This is not the proper answer. I have had this problem before and cannot find the proper answer again. The above will work but it is a work around for a problem in a firefox setup file. Sorry to not have the correct answer but the above although probably not wrong, in that it will probably work, is not exactly correct. More later hopefully

Cannot update Mozilla. It says "The Update could not be installed (patch apply failed)"

When updating Mozilla, I get this message:
"The Update could not be installed (patch apply failed)".
What should be done?

With that one, I'd try updating using a .dmg installer downloaded from the Apple Website:
http://www.apple.com/itunes/download/

The update could not be installed.

Since sometime the update (manual or automatic) fails
when restarting the browser i get this message
The update could not be installed. Please make sure there are no other copies of Firefox running on your computer, and then restart Firefox to try again.
there aren't any other firefox task running (checked with taskmanager)
i tryed to
-do a clean reinstall of firefox
-to remove folders \updated and updates in firefox folder
to start the browser as administrator
to disable antivirus (avira) and firewall (comodo)
but with no help

If updating isn't working then you need to download and install the full version.
If you intend to try out beta or nightly releases then you should be aware of this. 
Such issues can happen more often or the browser can stop working entirely (that is usually corrected with a respin).
Maybe it is best to stay with the official Firefox 13 release.
You can find the latest Firefox release in all languages and for all Operating Systems here:
*Firefox 13.0.x: http://www.mozilla.org/en-US/firefox/all.html
*http://www.mozilla.org/en-US/firefox/channel/
*http://nightly.mozilla.org/ Firefox Nightly Builds

"The update could not be installed. Please make sure there are no other copies of Firefox running on your computer, and then restart Firefox to try again"

I'm using Firefox 4 Beta and I tryed install update but I dont got success. Now every time that I go start the browser is displayed the mensage: "The update could not be installed. Please make sure there are no other copies of Firefox running on your computer, and then restart Firefox to try again"
My release is installed not in default drive C:\. I installed in the other Partition on my PC.
I don't have other release installed.

Try a clean re-install.
* Download the setup file from http://www.mozilla.com/en-US/firefox/RC (this is for the Firefox 4 release candidate)
* Uninstall Firefox, do not select the option to "Remove my Firefox personal data"
* Delete the Firefox installation directory - http://kb.mozillazine.org/Installation_directory
* Re-install Firefox
This process does not remove the Firefox user data such as bookmarks and passwords which are stored elsewhere in the profile folder.
You may also need to manually reset the Software Update feature by deleting the software update files as shown in the "Software Update not working properly" section here - http://kb.mozillazine.org/Software_Update

With the latest update I get the following error: The update could not be installed. Please make sure there are no other copies of Firefox running on your computer, and then restart Firefox to try again; suggestions, advice, help.

Help>About Firefox> says I am using Firefox/3.6.10./GTB7.1 I get a note from Mozilla that there is an update. I download it after granting permission to change my machine. I say OK. A green bar slides across the monitor announcing that the update is being downloaded. When I then assume it is being installed I get the following error: The update could not be installed. Please make sure there are no other copies of Firefox running on your computer, and then restart Firefox to try again. There are no other copies running. The machine is not on a network. I am using WIN7

Thanks for the info about Trojan. It may be the problem. Meanwhile I went to Admin/Owner side and did some cleaning -- including trying to reload my Favorite/Bookmarks that have always carried forth from previous levels of Windows XP and earlier.
The new computer here did not grab the Bookmarks from the previous, and yesterday I thought I had them loaded, and today went to Worker-Bee side and they are not showing.
About those add-ons... I have no idea, but think I got everything up to date yesterday. I will look at your earlier reply tomorrow or this weekend when I have more time at home to learn from it.
Thank you for your time in helping.
Late here, heading to sleep. Marilyn

Launch Firefox & message "The update could not be installed. Please make sure there are no other copies of Firefox running on your computer & then re-start Firefox again, But I don't have other copies running.

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