From: cjp on
Hi,
I found a solution for an error message on start up that states that
memory could not be written at 0x7c91b21a 0x00000010. It appears the
latest update for Windows Media Player is causing this problem if the
Service, Windows Driver Foundation. is turned on. It needs to be
disabled. I found this at Bleeping Computers and this solution
worked for me. Cathy
http://www.bleepingcomputer.com/forums/topic261076.html