Windows Errors

The file downloads fine and then...

Some people have gotten an error: "it says invalid file!"

I believe that the file is fine but your system is not recognizing that the file is zipped.

So first try: Right Click and Unzip

If that does not work then ...

If you do not have an unzip program I understand is a good one
General Video on 7-zip

And Windows 7 How to: