Tap here to go to the mobile version of the site.
Your Firefox is out of date and may contain a security risk! Upgrade Firefox

Support Forum

Unable to run the Firefox program


When I first started to firefox which is the best browser it installed just fine. Now however after uninstalling it after a few recurring problems and trying to re-install the program I am recieving this problems: You may not have the necessary permissions to use all the features of the program you are about to run. You may run this prgram as a different user or continue to run the program as the current user.

After trying as the current user it extract files and nothing more is told of it, I have no idea what it means by running by the program as a different user because I tried using all of my User names including my emails and nothing happened except it saying that the password is incorrect or the user name.

Can anyone help so I can just go back and browse the internet regurally like I have been doing before these problems started?

Additional System Details

This happened

Not sure how often

This started when...

I uninstalled firefox and re-installed it


  • User Agent:

More Information

  • Top 25 Contributor
  • Moderator
622 solutions 8042 answers

Helpful Reply

Have you got many user accounts setup on your Windows Operating System ? Ensure you use an administrator account.

Can you tell what is generating the error message ? Perhaps a screenshot will help

Also check any security software that you use in case that is blocking changes.

Helpful Reply

No i dont actually, I only own one user on this laptop and the security functions on this laptop is powered by Norton and says the program is safe and let's it proceed. I don't know how to create, log in, or use the Administration on my computer. I'll see if if I can upload a screenshot it just will not be until later.

Modified by FlightSchool

  • Top 10 Contributor
  • Moderator
10762 solutions 96861 answers

Check that Firefox isn't set to run as Administrator.

Right-click the Firefox desktop shortcut and choose "Properties".

Make sure that all items are deselected in the "Compatibility" tab of the Properties window.

  • Privilege Level: "Run this program as Administrator" should not be selected
  • "Run this program in compatibility mode for:" should not be selected