To run AutoCAD 2018 smoothly, your system should meet the following requirements:

Autodesk does not randomly update keys for fun. They update them to:

: Most modern subscriptions no longer use serial numbers. Simply choosing "Sign In" at the "Let's Get Started" screen will often activate the software automatically.

If you have a legacy USB or DVD box set, the serial number is usually located on the back of the packaging or on a sticker inside the case. Step-by-Step Activation Guide

If you are using a specialized version of AutoCAD, you will need a different key: AutoCAD Architecture 2018: AutoCAD Civil 3D 2018: 237J1 AutoCAD MEP 2018: 235J1 AutoCAD Map 3D 2018: 129J1 How to Find Your Serial Number

Autodesk AutoCAD 2018 the official product key is . Serial numbers are unique to each user and must be obtained through an official Autodesk Account or the original purchase documentation. Essential AutoCAD 2018 Product Keys

Every Autodesk product requires a specific to differentiate it from other software in the same suite. For the 2018 version, these are the most common keys: AutoCAD 2018 (Standalone): 001J1 AutoCAD LT 2018: 057J1 AutoCAD Architecture 2018: 185J1 AutoCAD Mechanical 2018: 206J1