.NET Framework 2.0: Exchange Server, SQL Server, or PowerShell crashes after you install security update 2449742 or 2446709

SUPPORT SOLUTION:
After you install security update 2449742 or 2446709 on a computer that is running Microsoft Exchange Server, Microsoft SQL Server, or Microsoft PowerShell, you may experience any of the following issues: Any application that has a dependency on the .NET Framework 2.0 Service Pack 2 or .NET Framework 3.5 Service Pack 1 could crash.On a computer that is running SQL Server, you cannot start PowerShell, and the SQL Reporting Service does not start.On a computer that is running Exchange Server, you cannot start PowerShell, Console, or Event Viewer.The Exchange Mailbox Replication Service exits unexpectedly.Additionally, an event is logged in the Application log. This event resembles one of the following:Faulting application Powershell.exe, version 6.0.6002.18111, time stamp 0×4acfacc6, faulting module mscorwks.dll, version 2.0.50727.5653, time stamp 0×4d54a59c, exception code 0xc0000005, fault offset 0×00000000001d9e19, process id 0x%9, application start time 0x%10..NET Runtime version 2.0.50727.3053 - Fatal Execution Engine Error (000007FEF9216D36) (80131506).This problem occurs when the broken version of Hotfix 979744 is installed on your computer, and when security update 2449742 or 2446709 (part of security bulletin MS11-028) is installed in the affected environments, this problem generates the issues that are described in the “Symptoms” section. .To resolve this problem, follow these steps: Confirm that the broken version of Hotfix 979744 is installed in your environment.Install the latest version of Hotfix 979744 from either of the following two locations: http://archive.msdn.microsoft.com/KB979744/Release/ProjectReleases.aspx?ReleaseId=3993
(http://archive.msdn.microsoft.com/KB979744/Release/ProjectReleases.aspx?ReleaseId=3993)
http://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=27109
(http://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=27109)
Note You do not have to uninstall the broken version of the hotfix or the security updates. You may have to restart the computer after you install this updated hotfix package..Steps to detect whether the broken version of Hotfix 979744 is installed on your computer

  Follow these steps, and then exit Registry Editor:  Click Start, click Run, type Regedit, and then press ENTER.Locate the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Package_1_for_KB979744~31bf3856ad364e35~x86~~6.0.1.0For this subkey, locate the followingDWORD value: CurrentStateIf the DWORD value is equal to 00000007, the broken version of Hotfix 979744 is installed on the computer.NoteThe Registry key for the latest version of the hotfix is as follows: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Package_1_for_KB979744~31bf3856ad364e35~x86~~6.0.2.0Note Hotfix 979744 is a prerequisite for Exchange 2010 SP1. .

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