If you need to activate AutoCAD 2018 legally:
– If you haven’t changed major hardware, reinstalling Windows may still produce the same request code. Use your original activation code. autodesk autocad 2018 activation code
: Disconnect from the internet and attempt to activate. Select "Request an activation code using an offline method" to generate a unique Request Code Request Activation Code : From an internet-connected device, visit the Autodesk Product Registration and Activation page Enter Information If you need to activate AutoCAD 2018 legally: