Review of Microsoft .NET Framework Repair Tool powered by the Slant community.
Repairs .NET Framework 4.6.1, 4.6, 4.5.2, 4.5.1, 4.5, 4.0 and 3.5, more information here Introducing the Microsoft .NET Framework Repair Tool.
Also see: .NET Framework Setup Cleanup Utility Helps You Completely Remove .NET Framework From Windows.