I am running Windows XP Servicepack 3. I clicked on the free download, saved it via IE8, and then I tried to run it. A few seconds later I pressed ENTER on the file name, I had this bad sound of "Windows" of Windows XP with the message that the file is corrupted.
Hello Knobman - I do not know why the file would be corrupted. I recommend downloading only on the official Mozilla website. You can click on this link to get the last and best version [just select 'Windows' and it should go]:
I hope this will help!