Instead of using risky unauthorized tools, you can legally activate AutoCAD 2018 through official channels:
While some third-party sites offer tools like Xforce Keygen to bypass official activation for AutoCAD 2018, using such software presents significant legal and security risks. These "cracking" tools often contain malware, including trojans and viruses
strictly prohibit the use of unauthorized activation methods, which can lead to software audits, legal action, or access blocks. Recommended Legal Activation Methods
that can compromise your data or damage your system. Additionally, Autodesk Terms of Use