hello Hairee, please see if it is working correctly with the full installer instead that can be obtained from https://www.mozilla.org/firefox/all/

I tried and its telling me it couldn't be downloaded.

is this link working? https://download.mozilla.org/?product=firefox-31.0-SSL&os=win&lang=en-US

if not could you attach a screenshot of the error message that you're seeing?

So from your link I got the response in the first image. Second and third pictures are what happens when I use the original link. Thank you so much for your help and patience.

do you have problems when you try to download other programs as well?

i see that one recommendation for the situation would be to reset IE to its default state: http://h30434.www3.hp.com/t5/Other-Desktop-PC-Questions/quot-This-file-or-signature-is-corrupt-of-invalid-quot/m-p/2984285/highlight/true#M39848

such issues might also be caused by malware on a computer though...

You can also try to download Firefox from the Mozilla CDN server here:

• http://download.cdn.mozilla.net/pub/mozilla.org/firefox/releases/latest/win32/en-US/

Another possibility is to open the Mozilla FTP website in Windows Explorer and download the Firefox set up file that way. See "How To Download Firefox On a New Computer Without Using Internet Explorer":

• http://www.howtogeek.com/125447/
• ftp://ftp.mozilla.org/pub/firefox/releases/latest/win32/en-US/