When you purchase a copy of AutoCAD 2015, you receive a product key, which is usually a 25-character alphanumeric code. This code is used to activate the software and unlock its full features. The Xforce product key is a type of product key that uses a specific algorithm to validate the software.
The software would generate a unique string based on the user's PC. The "Mem Patch": autocad 2015 product key xforce