Lately when I run Firefox a warning window will appear asking what I want this program to make changes to the computer. In addition, I'm unable to download PDFs from other sites.

This problem started about two weeks ago.

Check that you are not Firefox running as administrator.

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

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

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

Also check the firefox.exe program properties in the Firefox program directory.

Tags: Firefox

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    I would be so grateful to know how to fix t his, because it's really getting on my nerves.
    
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    A possible cause of this message, it is that Firefox is configured to run as administrator.

    Make sure that Firefox is not set to run as administrator.
    Right click on the desktop Firefox shortcut and choose "Properties".
    Make sure that all items are disabled in the tab "Compatibility" in the Properties window.

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

    Also check the firefox.exe program properties in the program Firefox (C:\Program Files\Mozilla Firefox\) folder.
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    Check that you are not Firefox running as administrator.

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

    In the Compatibility tab, make sure that this level of privilege: "Run this program as an administrator" is not selected.

    You should also check the firefox.exe program properties in the Firefox program directory.

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    Windows Registry Editor Version 5.00

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