.NET Framework Update Installation Error: “0x80070643” Or “0x643”

.NET Framework Update

Download the Microsoft .NET Framework Repair Tool to repair the following versions of the .NET Framework, and then reinstall the .NET Framework update:

  • The .NET Framework 4
  • The .NET Framework 3.5 SP1
  • The .NET Framework 3.0 SP2
  • The .NET Framework 2.0 SP2

For more information, see Version 2 of the Microsoft .NET Framework repair tool is available
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.NET Framework update

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