Then the installation ID changes, invalidating your key.
It is normal for this code to change slightly each time you open the window; any code displayed there will work for generating your key. Purchase or Login: dosprn registration key work
Once validated, the registration key "works" silently every time you load DOSPRN (e.g., via AUTOEXEC.BAT ). The software checks for the presence of the valid key signature before allowing advanced features like network printing or batch spooling. Then the installation ID changes, invalidating your key