Dotnetfx365.exe - !free!

This file is not an official Microsoft product. Microsoft’s official installers are typically named dotNetFx45_Full_x86_x64.exe , NDP48-x86-x64-AllOS-ENU.exe , or NDP472-KB4054530-x86-x64-AllOS-ENU.exe . The presence of "365" suggests a third-party compilation.