"A friend of mine has tried a few HDMI over USB adapter and found none worked for Hi-Def movies. Lag was a problem with these.
In the end, he dropped the project and ordered a media player called the
"KDLINKS HD700" from Amazon. He has not received it, but he says that after much reading it comes as one of the most recommended.
His old PC will be used as a file server, files will be played back using the KDLINKS HD700 unit.