Windows 2008 RU2 SP1 to upgrade .NET 3.5 to .NET 4.0

Dennis Hou 1 Reputation point
2022-04-04T21:35:26.353+00:00

My problem is when I upgrade Symantec SEPM 12 to SEPM 14, it needs .NET 3.5 to upgrade to .NET 4.0.
I have tried so many ways to upgrade .NET, it just doesn't allow me to upgrade ( the attached is the log img)189911-install-faild.png.

I did tried to add the certificate (microoceraut2011_2011_03_22.crt) to our system then run the upgrade in different ways, but it still got the same error message.
Can you tell my how to up grade .NET for Windows 2008 RU2 SP1? ( I tried to upgrade from Windows 2008 RU2 SP1 to SP2, it doesn't allow me to do either.

Do I have to upgrade Windows 2008 to 2012 or up?

Thanks

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  1. Dave Patrick 426.1K Reputation points MVP
    2022-04-04T21:42:24.76+00:00

    tried to upgrade from Windows 2008 RU2 SP1 to SP2, it doesn't allow me to do either

    Please run the system update readiness tool.
    https://www.catalog.update.microsoft.com/Search.aspx?q=KB947821
    (most likely windows6.0-servicing-x64-5sep14_8b80d0a1edd3f2051e9e9c6c8479397a3cb4fc35.exe assuming 64 bit)

    Then post the results of;
    %SYSTEMROOT%\Logs\CBS\CheckSUR.log