Mozilla VPN is currently experiencing an outage. Our team is actively working to resolve the issue. Please check the status page for real-time updates. Thank you for your patience.

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Le thread ibilondoloziwe. Nceda ubuze umbuzo omtsha ukuba ufuna uncedo.

Firefox will neither load, uninstall or upgrade, due to a Firefox running message, when it isn't.

  • 1 phendula
  • 2 inale ngxaki
  • 1 view
  • Impendulo yokugqibela ngu cor-el

AnonymousUser
AnonymousUser
more options

I have just installed the program. It won't start. I tried to uninstall; however, a message came up that it wouldn't uninstall while running. Windows xp says it is not running. The same message appeared when attempting instead to upgrade.

User Agent

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Comcast Install 1.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; BO1IE8_v1;ENUS)

I have just installed the program. It won't start. I tried to uninstall; however, a message came up that it wouldn't uninstall while running. Windows xp says it is not running. The same message appeared when attempting instead to upgrade. == User Agent == Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Comcast Install 1.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; BO1IE8_v1;ENUS)

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

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.

You can skip the step to create a new profile, that is not necessary for this issue. ..... See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall