We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

Hierdie gesprek is in die argief. Vra asseblief 'n nuwe vraag as jy hulp nodig het.

When I start Firefox I get a bar stating "Software Update Failed"

  • 1 antwoord
  • 23 hierdie probleem
  • 1 view
  • Laaste antwoord deur cor-el

more options

In the body of the bar is says--The update could not be installed. Please make sure there are hno other copies of Firefox running on your computer, and then restart Firefox to try again. I click ok and Firefox starts. I go to help and click Apply download and it says that it can't. Check history of downloads and it says the last download was on December 1969, yes 1969. I was twelve and the only computer that I knew of was one on an air force base and it was as big as a house, water cooled and vacuum tubes. Quite a site.

In the body of the bar is says--The update could not be installed. Please make sure there are hno other copies of Firefox running on your computer, and then restart Firefox to try again. I click ok and Firefox starts. I go to help and click Apply download and it says that it can't. Check history of downloads and it says the last download was on December 1969, yes 1969. I was twelve and the only computer that I knew of was one on an air force base and it was as big as a house, water cooled and vacuum tubes. Quite a site.

All Replies (1)

more options

See:

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)

You may need to do a clean (re)install:

  • 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 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.

You do not need to create a new profile, that is not necessary for this issue.


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.