This is the response to a similar question in another forum:
"The file the error refers to is not the legit Windows Media Player, it's spyware. There is no "services" folder under System32. The spyware removal program correctly removes the spyware, but does not clean up the startup entries for it.
"Go into Misconfig (Start>Run>type misconfig and then OK) and remove any entries for "xpsystem" (there will be at least three - one in Run, one in RunServices, and one in WIN.INI)"