If you don't actually have any DRM music:
Originally Posted by http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1313722&SiteID=1
if you want to get rid of mfpmp.exe go to //windows/system32 and find 'mfpmp' edit rights to full acces and then rename the file to mfpmp.exe.bak
then you won't get errors and your computer won't use much of your CPU. good luck!!