"High encryption mismatch" error message occurs when you try to install Visual Studio .NET (319720)


The information in this article applies to:

  • Microsoft Visual Studio .NET (2003), Academic Edition
  • Microsoft Visual Studio .NET (2003), Enterprise Architect Edition
  • Microsoft Visual Studio .NET (2003), Enterprise Developer Edition
  • Microsoft Visual Studio .NET (2003), Professional Edition
  • Microsoft Visual Studio .NET (2002), Enterprise Architect Edition
  • Microsoft Visual Studio .NET (2002), Enterprise Developer Edition
  • Microsoft Visual Studio .NET (2002), Professional Edition
  • Microsoft Visual Studio .NET (2002), Academic Edition
  • Microsoft Visual C++ .NET (2003)
  • Microsoft Visual C++ .NET (2002)
  • Microsoft Visual Basic .NET (2002)
  • Microsoft Visual Basic .NET (2003)
  • Microsoft Visual C# .NET (2003)
  • Microsoft Visual C# .NET (2002)
  • the operating system: Microsoft Windows NT 4.0
  • the operating system: Microsoft Windows NT 4.0 SP6a
  • Microsoft Visual J# .NET 2002
This article was previously published under Q319720
IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SYMPTOMS

When you try to install Visual Studio .NET (VS .NET), and you click Step 2 (Windows Component Update), you receive the following error message:
"High Encryption Mismatch"
The dialog box provides you with the choice either to Download or to Exit.

When you click Download, the Service Pack 6a (SP6a) High Encryption does not fix this problem, and you receive the error message that you received previously.

CAUSE

During a previous application of the SP6a High Encryption, the following registry key was not written to the registry: 
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Hotfix\Q246009]
"Installed"=dword:00000001

RESOLUTION

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
You must create the missing key manually to proceed with the installation. To create the key, follow these steps:
  1. On the Start menu, click Run.
  2. Type regedit, and then click OK.
  3. Locate the following registry key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Hotfix\
  4. On the Edit menu, click New, and then click Key.
  5. Add a new key named Q246009.
  6. On the Edit menu, click New, and then click DWORD Value.
  7. Add a DWORD value named Installed.
  8. Double-click Installed, and then set the value as 1.
  9. Close Registry Editor.
  10. Install Visual Studio .NET.
If you receive the error message after completing the previous steps, click Continue. Setup should complete successfully.

STATUS

Microsoft has confirmed that this is a bug in Windows NT 4.0 SP6a.

MORE INFORMATION

Steps to Reproduce Behavior

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
To reproduce the problem, follow these steps:
  1. On the Start menu, click Run.
  2. Type regedit, and then click OK.
  3. Locate the following registry key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Hotfix\
  4. On the File menu, click Export, type Q246009 for the file name, and then click Save.
  5. Delete the key named Q246009.
  6. Install Visual Studio .NET.
Modification Type:MinorLast Reviewed:1/25/2006
Keywords:kbvs2005doesnotapply kbvs2005swept kbtshoot kberrmsg kbprb kbsetup KB319720 kbAudDeveloper
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