http://www.microsoft.com/downloads/en/confirmation.aspx?FamilyID=5c3c5f97-678c-4c99-a7fc-f84f320c626f&displaylang=en

Screen-cast recording and video encoding app from Microsoft. Can convert to WMV/WMA in Express Version, and to MPEG4(H.264,AAC) in Pro version. Can record a selected area of the screen