.NET Framework Problems After Update

​I installed the following recent Windows updates: ​​Security Update for Microsoft .NET Framework, Version 2.0 (KB917283)​​ , & ​​Security Update for Microsoft .NET Framework, Version 1.1 Service Pack 1 (KB886903)​​.​

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​ After the updates were installed, I began getting 10 “Missing Program Files” messages when I run Norton SystemWorks One Button Checkup.​

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​The first one is: “C\WINDOWS\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe” cannot access a necessary file, “msvcr80.dll.” Does this mean that NET Framework isn't opening?​

​ All 10 say: “C\WINDOWS\Microsoft.NET\Framework\v2.0.50727\****” cannot access a necessary file, “msvcr80.dll.” ​

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​ I tried uninstalling & reinstalling Microsoft .net Framework 1.1, Microsoft .net Framework 1.1 Hotfix (KB886903), & Microsoft .net Framework 2.0, then installing the updates again.​

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​ I am still getting the same getting 10 “Missing Program Files” messages when I run Norton SystemWorks One Button Checkup.​

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​Any suggestions?​

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​Latitude D810, WinXP Pro, ​