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Firefox download file runs but doesn't load Firefox

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After running "Firefox Setup 43.0.1.exe", it extracts the file and opens a dialogue box that says "That operation completed successfully". Nothing more happens and the Program (x86) Directory includes a Mozilla Firefox folder that contains only four FAPXXXX Tmp files at 0 KB.

Where do i go from here?

After running "Firefox Setup 43.0.1.exe", it extracts the file and opens a dialogue box that says "That operation completed successfully". Nothing more happens and the Program (x86) Directory includes a Mozilla Firefox folder that contains only four FAPXXXX Tmp files at 0 KB. Where do i go from here?

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Did you follow the FAQ to install Firefox on Vista? https://support.mozilla.org/en-US/kb/get-latest-version-firefox-windows-xp-vista