: Check the "Readme" or system requirements for the software you are trying to run. It will specify the exact version (e.g., "Requires .NET Framework 4.5").

Based on years of troubleshooting, here are the real versions most commonly mistaken for 4.3:

: You can verify which versions are actually on your PC by checking HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP .

Not recommended unless building a custom golden image.