Hi,
I'm not sure if someone posted this yet but you can use Windows Media 9 encoder screen capture feature to record some games. Not sure of the quality because I haven't had time to record yet it does work for some games. Here are the links to download-I can't seem to find the official links from microsoft anymore as they stopped supporting it.
32bit
http://www.mediafire.com/?bs8tt6olq7a7z2b
64bit
http://www.mediafire.com/?868jw168851wuax