What are you trying to accomplish w/the KVM switch? Control a second box? If that is all you want to do, try
VNC Vitrual Network Computing.
I was in the same boat a few weeks ago. AFTER I spent $110 and bought a 4-port KVM, many great folks here at AT suggested I try VNC. It works, exactly as advertised and best of all, it costs you nada, nothing, zero, zilch. It's FREEWARE.
It's basically a remote desktop proggy. You can see the desktop of any box you choose to load VNC on. ONe catch...you can't game over it or anything as the refresh is very slow...but that's not what it's for.
I switch b/t boxes to install software/reboot and not much else. For things liek file sharing, I already created shares on all my boxes and go thru Windows Explorer, since all three of my boxes are networked thru a router.
Good luck.