You receive a "Microsoft .NET Framework 1.1 Service Pack 1 (KB867460) cannot be installed " error message when you install the .NET Framework 1.1 Service Pack 1 (889109)

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 the Microsoft .NET Framework 1.1 Service Pack 1 (SP1), you may receive the following error message:

Microsoft .NET Framework 1.1 Service Pack 1 (KB867460) cannot be installed because you have one or more hot fixes installed. Remove them and try again.

If you remove and reinstall the .NET Framework 1.1, you receive the same error message when you try to install the .NET Framework 1.1 SP1.

Note This behavior occurs when you try to install the .NET Framework 1.1 Service Pack 1 from Windows Update. It also occurs when you download the package from Microsoft Downloads and try to install it.

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.
To resolve this problem, follow these steps:

Click Start, click Run, type regedit, and then click OK.
Locate and then click the following subkey in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\.NETFramework\1.1\M827821
On the Edit menu, click Delete.
Click Yes to confirm that you want to delete the subkey.
Exit Registry Editor.
Run the Setup program for the .NET Framework 1.1 SP1 again.

MORE INFORMATION

Steps to reproduce the problem

Determine that the M827821 registry subkey exists. To do this, follow these steps:
1. Click Start, click Run, type regedit, and then click OK.
2. Locate the M827821 subkey in the following subkey:
  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\.NETFramework\1.1
3. Exit Registry Editor.
Install the .NET Framework 1.1 SP1.

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

885055 How to obtain Microsoft .NET Framework 1.1 Service Pack 1