My system is VISTA 64X Ultimate. When I run media center, it run for few second and then it stops responding. The following information was shown in event log.

Fault bucket 166368077, type 5
Event Name: CLR20r3
Response: None
Cab Id: 0

Problem signature:
P1: ehshell.exe
P2: 6.0.6001.18000
P3: 47919e0e
P4: mcstoredb
P5: 6.0.6000.0
P6: 4791ad20
P7: 121
P8: 23e
P9: System.InvalidOperationException
P10:

I have found this has something to do with user's profile because this only happen to one domain account. Other user accounts, even also a domain account, were fine. Ater I remove the user profile and recreat a new one. The problem seems go way. Still don't know other alternative to solve this issue.

Here are some references to this issue.

http://thegreenbutton.com/forums/thread/175130.aspx