How can I retrieve the serial number on my Soildworks 2018 software
Show Serial Number
Is the software still installed on your system?
If yes, do as J. Mather shows.
If it is not installed there may still be legacy information in your registry.
Search in your registry for a section for SolidWorks (there may be several and there are different registry categories that may contain it),
Most likely it is under
CAUTION - IF YOU ARE NOT KNOWLEDGEABLE ABOUT THE REGISTRY - Don't change or delete anything - You can kill you system if you do things wrong.
go to help and then about that should show you the #
that of go to the sw licence manager and that should show you more than you would want to know....
Retrieving data ...