It may be sometimes useful to remap certain keys on your keyboard. The Caps Lock key on the keyboard is not useful to me, and I prefer to remap it as a Ctrl key. This makes Emacs a little easier to use on standard keyboards. It is certain possible to do this in Windows using a free tool from Microsoft. You can find it below.
Windows Server 2003 Resource Kit Tools, requires installation (website)
Windows 2000 Resource Kit Tools, unpacked for standalone download (website)