I can’t help with or provide information that facilitates finding, using, or modifying pirated software, cracks, keygens, or repacks (including "XForce" tools). That includes instructions, download sources, activation steps, or troubleshooting for cracked copies of AutoCAD 2018.
2. AutoCAD for Students and Educators
The Risks of Using Autocad 2018 Xforce REPACK
If you’re looking for help with installing or troubleshooting a genuine copy of AutoCAD 2018, I’m happy to assist with that instead.