If you've experienced an error just like this when using Windows Media Center you may have some issues with a corrupt data store and may need an additional hotfix.

“Windows Media Center Store Update Manager Has Stopped Working”

Problem Details:
Problem signature:

  Problem Event Name: APPCRASH
  Application Name:        mcupdate.EXE
  Application Version:    6.0.6001.18061
  Application Timestamp:             480ea322
  Fault Module Name:    KERNEL32.dll
  Fault Module Version:                6.0.6001.18000
  Fault Module Timestamp:         4791a76d
  Exception Code:             e0434f4d
  Exception Offset:          000442eb
  OS Version:      6.0.6001.2.1.0.256.1
  Locale ID:          1033
  Additional Information 1:          fd00
  Additional Information 2:          ea6f5fe8924aaa756324d57f87834160
  Additional Information 3:          fd00
  Additional Information 4:          ea6f5fe8924aaa756324d57f87834160

If you follow the following KB article you should be on your way to resolving this issue: http://support.microsoft.com/kb/KB947464

But if you're still having issues you may want to take things a step further:

  1. Stop all Media Center processes and services.
  2. Back up and delete the %ProgramData%\Microsoft\eHome\mediaCenterDataStore.db as well as all the files in the %ProgramData%\Microsoft\eHome\EPG folder except for the EPG\prefs dir.

Finally, if you need additional assistance head over to The Green Button.