Choose option a or b. Select I have an activation code from Autodesk 7.Once at the activation screen: to download it and then start XFORCE Keygen 32bits or 64bits version 8.Click on Mem Patch (you should see successfully patched) 9.Copy the request code into the keygen and press generate 10.Now copy the activation code back to the activation screen and click Next 11.You have successfully registered the trial version to AutoCad 2012 32 bit/64 bit Full Version 12.Done.