The app asking for 4.0 will run perfectly on 4.8:
Microsoft provides a targeting pack that allows apps built for 4.0 to run on 4.8. Download Net Framework 4.0.3019 For Windows 7 64 11 Fix
If you are actually on Windows 7 64-bit (not Windows 11), follow this exact order: The app asking for 4
| Step | Action | File / Command |
|------|--------|----------------|
| 1 | Install Windows 7 SP1 (required) | KB976932 |
| 2 | Install Windows Update KB3063858 | (Cryptographic update) |
| 3 | Install .NET 4.0 Standalone | dotNetFx40_Full_x86_x64.exe |
| 4 | Install KB2468871 | NDP40-KB2468871-v2-x64.exe |
| 5 | Reboot | — |
| 6 | Verify | clrver command or Registry: 4.0.3019 | Download Net Framework 4.0.3019 For Windows 7 64 11 Fix
