Quick Fix for Microsoft .NET Framework -

Quick Fix for Microsoft .NET Framework: If you’re having an issue with Microsoft .NET Framework and you want to fix this computer problem, I will show you how in this video. A lot of programs need Microsoft .NET Framework to work properly, so if it is corrupt and needs to be repaired or reinstalled, I can show you how in an easy to follow step by step guide.
A tool called .NET Framework Setup Verification Tool is able to run a check on the versions of .NET that have been installed on your computer and check its verification and validate any files, folders or registry entries relating to .NET and tell you if they are missing or corrupt,

The .NET Framework setup verification tool supports verifying the following products:

.NET Framework 1.0
.NET Framework 1.1
.NET Framework 1.1 SP1
.NET Framework 2.0
.NET Framework 2.0 SP1
.NET Framework 2.0 SP2
.NET Framework 3.0
.NET Framework 3.0 SP1
.NET Framework 3.0 SP2
.NET Framework 3.5
.NET Framework 3.5 SP1
.NET Framework 4 Client
.NET Framework 4 Full
.NET Framework 4.5
.NET Framework 4.5.1
.NET Framework 4.5.2
.NET Framework 4.6
.NET Framework 4.6.1

Download
https://blogs.msdn.com/b/astebner/archive/2008/10/13/8999004.aspx

Download
Microsoft .NET Framework Repair Tool
https://www.microsoft.com/en-gb/download/details.aspx?id=30135
This tool detects and tries to fix some frequently occurring issues with the setup of Microsoft .NET Framework or with updates to the Microsoft .NET Framework.

Windows System Update Readiness Tool
https://windows.microsoft.com/en-us/windows7/what-is-the-system-update-readiness-tool

Try running sfc /scannow

.NET Framework Setup Cleanup Utility
https://blogs.msdn.com/b/astebner/archive/2008/08/28/8904493.aspx