If you're interested in using AutoCAD 2021, here are some steps and considerations for obtaining it legally:

  1. Download the installation package from the official Autodesk website or insert the installation media.
  2. Launch the installation process and follow the prompts until you reach the "Enter Serial Number" page.
  3. Enter your serial number and click "Next."
  4. On the "Enter Product Key" page, enter the product key: 001M1.
  5. Follow the remaining installation steps to complete the process.
  1. Verify ownership: Log into your Autodesk account to confirm you have a valid subscription.
  2. Retrieve your unique serial number from the account dashboard. Do not use a generic number from Google.
  3. Confirm the product key is 001M1 (zero-zero-one-M-one).
  4. Download from Autodesk only.
  5. Run as administrator and enter your credentials when prompted.
  6. Complete the installation and launch the software to auto-activate.

: Most 2021 subscriptions use "Sign In" activation. Just launch the software and log in with your Autodesk ID—no serial number required. Product Key

Step 5: Launch & Activate

While 001M1 is the universal product key for the standard 2021 version, your serial number is unique to your subscription or license. You can locate these details through several official channels: