Step 11: Open Labcenter Electronics, open Proteus 8 professional, open DATA, then open Library and paste the files you copied earlier. If you are using windows 32 machine you will have just Program Files. Step 10: Open your local disk drive and navigate to Program Files (x86) if you are using a windows 64 machine. Inside the extracted file, open the file called Arduino Proteus libraries Step 9: Highlight all files inside the Arduino Proteus libraries, then copy all. Step 7: Click finish after the installation is complete and do not open the installed software yet Step 6: Click next and allow the installation to proceed and complete Step 5: Choose destination location (it is a good practice to continue with the default location destination)