You try to open or create Information Rights Management (IRM)-protected content by using one of the following applications:
Microsoft Word 2010
Microsoft Outlook 2010
Microsoft Excel 2010
Microsoft PowerPoint 2010
In this scenario, the Office 2010 application freezes before it starts fully.
To resolve this issue, install the following hotfix:
2553474 Description of the Office 2010 hotfix package (Mso-x-none.msp): December 11, 2012
Note After you apply this hotfix package, you must match the URL values that are under the ServiceLocations registry key and in the service connection point objects, and remove all port numbers from the URL values.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.