When I try to open Firefox 4.0 I get an error message saying that it is not a valid Win32 Application. What do I do? I am using Windows XP Sp3

I downloaded Firefox 4.o exe. When I tried to open it I got an error message stating that it was not a valid Win32 application. I am using windows XP SP3. How do I get it to open?

[[Firefox is already running but is not responding]] has steps that you can try. It sounds like you may have something that is hanging your browser on exit (probably an extension or a locked profile) and the steps on that page should help clear it up.

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    ~~~~~~~~~~~~~~~
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