64 bit processor downloading

You need to be more specific. What are you downloading? What operating system are you dealing with?

It's also possible that while you have a 64-bit processor, you may be running the 32-bit version of the operating system.

I am running windows XP I was downloading comando firewall program.

Like DrewDad said, if you aren't running the 64-bit version of Windows XP, and those versions of XP are rare, then you can't run 64-bit programs.

Incidentally, XP has a built-in firewall that may work better than the one you are trying to install.

Thank y0u for your answers, I am not sure what my operating system is 32 or 64 bit. But now I know what to look for.

Thank you all for replies

ferdie611