The recommended way to get .NET 2.0.50727 on modern systems. It includes the full runtime for versions 2.0 and 3.0. Available from Microsoft Download Center. .NET Framework 2.0 SP1

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A legacy standalone installer specifically for 64-bit Windows XP or Server 2003. Download from Official Microsoft Center. Why is Version 2.0.50727 Required? Microsoft .NET Framework 2.0 Service Pack 1 (x64)

: If you encounter an error stating "The application failed to initialize (0xc0000135)" or a specific request for version 2.0.50727, the runtime is likely missing from your system.