I can't download Firefox. Windows is blocking it, saying the source is not registered.

I am trying to download Firefox, but Windows/Internet Explorer 8 is blocking it...saying the file is not registered/certified etc. I tried to upload the certificate, but it still won't let me do it. Seems like another Microsoft attempt to stop people from using competing software. How can I get around this so I can start using Firefox?

If the above doesn't work, your issue may be caused by Firefox files left from the previous install.
In this case, please delete the Firefox installation folder, which is located in one of these locations, by default:
*'''Windows:'''
**C:\Program Files\Mozilla Firefox
**C:\Program Files (x86)\Mozilla Firefox
If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory.
If the above doesn't work, please also delete the Firefox application data from your computer.
<b>WARNING: </b>Removing folders/files can cause damage to other programs and the Windows operating system. use caution when manually deleting folders/files. <u><b>Creating a backup of any deleted files is highly recommended!</b></u>

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