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when download is complere i get message "unknown Publisher" and i will not install

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running xp when i try to download the download completes then the box says "unknown Publisher" i do not get a chance to go on. and it does not install

running xp when i try to download the download completes then the box says "unknown Publisher" i do not get a chance to go on. and it does not install

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Don't try to run the Firefox installer directly, but save the file to the desktop and start the installation with a double-click on that icon on the desktop.

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it does not download it says download failed publisher unknown