Symptoms
A server that is running Microsoft Forefront Threat Management Gateway (TMG) 2010 may crash, and the following Stop error occurs:
DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)
Arguments: Arg1: 000000000000002c, memory referenced
Arg2: 0000000000000002, IRQL
Arg3: 0000000000000000, value 0 = read operation, 1 = write operation
Arg4: fffff8800473bad9, address which referenced memory
Resolution
To resolve this problem, install the hotfix package that is described in the following Microsoft Knowledge Base article:
2735208 Rollup 3 for Forefront Threat Management Gateway (TMG) 2010 Service Pack 2
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
