Windows 64bit
1. Install Pro-Demo (Run as administrator)
2. Don't Let Install set folder location: It must be as shown here.
Installation Path - C:Program Files (x86)Labcenter ElectronicsProteus 8 Professional
Program Data Path - C:Program Files (x86)Labcenter ElectronicsProteus 8 Professional
3. Check proteus is working in Demo Mode.
4. Apply Patch