: If you have a valid serial number, you can download specific service packs directly from the SolidWorks Customer Portal SolidWorks 2013 System Requirements
I can also mention free alternatives if they can't afford a license. Software like FreeCAD, LibreCAD, or Fusion 360 might be suitable for educational or hobbyist use. If they're a student or educator, SolidWorks offers free subscriptions through the Academic Program, which is a legal and ethical route. solidworks 2013 full indir gezginler link