What is this NETFXRepair.exe in my %windir%\Microsoft.NET directory?

In my %windir%\Microsoft.NET directory I see NETFXRepair.exe with a lot of NETFXRepair.xxxx.dll files.

What are these files used for?

Solution 1:

It's obviously a system file; you can tell this because it's located in the Windows directory.

More specifically, it's a component of the .NET Framework. This is rather obvious by virtue of its containing folder's name. According to this blog post, the executable and its associated DLLs are components of version 4 of the framework.

It says (and you can infer from the name) that they are

Resource files for .NET OS upgrade repair.

More importantly, why are you messing with these files? Are they causing you a problem?