Update KB976569 returns Error Code: 0x66A

While running Windows Update I am getting 0x66A error code. It keeps on appearing. I tried to re-run the update a number of time but that did not helped much. What are the possible options available that can help me to fix the issue. I think the update is important and cannot be ignored. I found on web that the update is related to some .NET Framework 2.0 Service Pack 2.

1. Unregister Windows Installer:

Click Start, click Run, type msiexec /unregister, and then click OK.

1. Reregister Windows Installer:

Click Start, click Run, type msiexec /regserver, and then click OK.