Bisogna dare alla cartella TEMP di Windows l’accesso a “everyone”.

Il Video https://www.youtube.com/watch?v=AE_6vYMm7vY

If you are installing (or configuring) software on your Window 7, 8 or 10 PC, you may see ERROR 2503 followed by ERROR 2502:

Fortunately there is both a fix and workaround for this problem:

HOW TO FIX ERROR 2503 2502:

Set the permissions on C:\WINDOWS\TEMP to AUTHENTICATED USERS = FULL CONTROL

HOW TO WORK AROUND ERROR 2503 2502:

End task on EXPLORER.EXE and start a new one WITH ADMIN PRIVILIGES.

You might also try running the .MSI from an elevated command prompt.