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Unable to install 5.0.1. Get message saying must restart to complete previous upgrade, but it never completes and I continuouisly get the "Restart" message.

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Yesterday I upgraded to Firefox 5.0.1. My system is Win7 64-bit. The program asked me to restart to complete upgrade; however, even after restart I continue to get the same message. I attempted to "uninstall" via Windows Control Panel and even within the Mozilla Firefox program file. Again, the only message I get is to "restart to allow upgrade to complete.

Yesterday I upgraded to Firefox 5.0.1. My system is Win7 64-bit. The program asked me to restart to complete upgrade; however, even after restart I continue to get the same message. I attempted to "uninstall" via Windows Control Panel and even within the Mozilla Firefox program file. Again, the only message I get is to "restart to allow upgrade to complete.

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The program must close to allow a previous installation attempt to complete

https://support.mozilla.com/en-US/kb/The%20program%20must%20close%20to%20allow%20a%20previous%20installation%20attempt%20to%20complete

Check and tell if its working.

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Thanks for your reply. I found that article while troubleshooting; however, those files do not exist. In other words, when I search for %APPDATA%, it takes me to a "roaming" folder, but there is no file named qpidata...

So, I am in a circular issue where I am prompted to restart windows to "finish upgrade" but even after restart, I continue to get the same "restart windows to finish..." message.

Anything else I should try?

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Install Firefox on Windows

https://support.mozilla.com/en-US/kb/Installing%20Firefox%20on%20Windows

Check and tell if its working.

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Do you have a VirtualStore folder?

  • C:\Users\<user>\AppData\Local\VirtualStore\Program Files\Mozilla Firefox

The "Application Data" folder in XP/Win2K and the "AppData" folder in Vista/Windows 7 are hidden folders.

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Thanks for your suggestions. I am traveling until Friday, so I will put you suggestions into action then. I'll let you know the outcome.

Ideally I will completely uninstall Firefox and the reinstall. I did try to install Firefox on top of my current version, thinking this might fix the issue; however, I got the "...you must restart Windows to complete previous upgrade..."

Thanks again.