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Strange non-fatal message when Firefox 6.02 starts in Win XP Pro x64

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New User

Strange non-fatal message when Firefox 6.02 starts in Win XP Pro x64

Since updating to version 6.02, a non-fatal message appears when starting Firefox. Message is: "Using registry key: Software\AppDataLow\1fd1c56". Clicking "OK" results in Firefox loading. Frequent page redirects to random sites. No change after backing up profile with Mozbackup 1.51, uninstalling/reinstalling Firefox, then restoring profile from Mozbackup. Modest improvement after regedit deletion of registry key, but it reappears. Malwarebytes found and removed Win32:Adrotator, but problem persists.

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New User

Re: Strange non-fatal message when Firefox 6.02 starts in Win XP Pro x64

On Firefox 7.0.1 on Windows XP, I found a mysterious "z 4.6.7.6" addon that was causing the problem. The "z 4.6.7.6 add-on" doesn't have an Uninstall feature, so I typed "about:support" in the address bar and looked up the extension ID. I then deleted the folder "C:\Program Files\Mozilla Firefox\Extensions\<Extension ID>" and restarted Firefox. The add-on was gone and so was the problem!