The missing updates: KB2754670 is an security update for a Works converter, is there an old copy of Office installed on that machine?; KB954430 is an update for MSXML, which should not happen on an up2date system (I assume, it is Windows 7 as you talked about SP1).
The downloading problems of mpam-fe*.exe is caused by MS' unsynced servers and a aborted connection. It's difficult to fix as it's nearly impossible to find the reason for the aborted connection. Two quetions may help: Is you internet speed high or low (subjective & download speed in kbps)? Is your internet connection on high load?