f you already have USB-Emulator for Mastercam X7 for SW installed skip step 3 1. Install MasterCAM X8 (v17.0.15029.10) for SolidWorks 64bit. Select SIM Type : NetHASP 2. Copy all files and folders from folder "McamforSWx8" to (by default C:Program FilesMcamforSWx8) and overwrite original ones 3. Install USB-Emulator ATTENTION! To install emulator you need Administrator rights! To install emulator for 64bit Win Vista or Win7 you need to boot computer in mofe F8 > "Disable Driver Signature Enforcement" Moreover you need to use boot mode F8 > "Disable Driver Signature Enforcement" at every reboot of computer! 3.1. Copy folder "USB_Emul_Win64" to C: 2.2. Run (as Administrator) "mcam_X5_X7_nethasp_SSQ.reg" and confirm to add info in Windows Registry 2.3. Run ..USB_Emul_Win64install.bat and wait until system will find and install new devices