"MyDefrag-v4.3.1.exe is not a valid Win32 application"

[AndrewF]

I'm on a new Lenovo Windows 7 notebook. I just downloaded MyDefrag 4.3.1. I tried to run it (or the installer, which I think is what I actually downloaded) and after the standard "Are you sure you want to run this program" dialog, I get this error: "c:\Users\andrew\Downloads\MyDefrag-v4.3.1.exe is not a valid Win32 application."

I didn't see this error anywhere else. What's up?

Edit: by the way, I'm using the 64 bit version of windows, and my CPU is an i5. I'm not sure how much that has to do with it, since it's supposed to still run 32 bit programs.

[Darlis]

Try downloading the installer again. Maybe there was problem while downloading.
You can check the integrity of the file by comparing the hash value (for example with HashTab): MD5 8F860C4136F998C05B26FDCAA42699C0

[AndrewF]

That was easy . It was corrupted. Thank you. Thanks, also, for pointing me to HashTab. That's a slick little program.