Update - finally received my echo and this works like a charm. Alexa understand all the channels i tell it, including even pronouncing instead of spelling out "masn.". If weird popups come up that my mother in law can't decipher she can now just say "Alexa, trigger fix the TV." This calls a recipe on iftt that uses the maker channel to call a cgi script on my web server. That is just a bash script containing several "alt-f4" commands followed by a wmc start command, sent via telnet to the listening port on the windows machine. Similarly she can trigger "live tv" or any of her favorite channels, or turn the volume up or down several notches, etc. The initial setup is a little tricky but once it works, adding commands is just cut and paste and goes quickly. There is a couple seconds lag, but still faster than typing numbers into the remote for channel changes. Also unlike the remote, if my mother in law does something wrong, this generally won't do anything at all, so she won't get confused. If anyone is interested enough to try, reply and I can put the details in an instructable or something.