Windows 7 - Media center help

I can't view videos..media center.just freezes and windows 7 forces media center to close..here is info from event viewer...anybody got a clue..

running windows 7 home
Log Name: Media Center
Source: Microsoft-Windows-Media Center Extender
Date: 12/26/2011 1:45:39 PM
Event ID: 112
Task Category: Session Enforcement
Level: Error
Keywords:
User: WHITAKERS-PC\Mcx1-WHITAKERS-PC
Computer: WHITAKERS-PC
Description:
The Media Center Extender session was terminated because Windows Media Center exited unexpectedly.
Event Xml:
<Event xmlns="Error">
<System>
<Provider Name="Microsoft-Windows-Media Center Extender" Guid="{7B7838A3-6562-4269-BB7A-97B0D9593882}" />
<EventID>112</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>1</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2011-12-26T18:45:39.101755000Z" />
<EventRecordID>307</EventRecordID>
<Correlation />
<Execution ProcessID="3988" ThreadID="4384" />
<Channel>Media Center</Channel>
<Computer>WHITAKERS-PC</Computer>
<Security UserID="S-1-5-21-1486689636-741082354-3436860443-1008" />
</System>
<EventData>
</EventData>
</Event>