Windows System Requirements for the PlayStation Emulator:
Processor: Any Dual-Core CPU, or a Single-Core CPU of at least 2.0GHz
Memory: 2GB RAM (more is better)
Hard Drive: 5GB minimum free disk space (for application and ROM storage) The more games you have, the more Hard Drive space you need
Video: 256MB Stand Alone Graphics Card (note that some built-in GPUs may work too)
Operating System: Windows XP, Windows Vista, Windows 7, or Windows 8
Software Requirements for Running the PSP Emulator
➤ A Software extractor, such as 7-Zip or Winrar
➤ The latest version of the PPSSPP Emulator
➤ Microsoft's Visual C++ Redistributable Packages for Visual Studio 2013 (supports from version '0.9.7' of the PSP Emulator, up to the latest version).
♦ If you are running an older install of the PPSSPP Emulator, and are on an x86 (32-bit) system, you should instead install Microsoft Visual C++ 2010 Redistributable Package (x86)
♦ If you are running an older install of the PPSSPP Emulator, and are on an x64 (64-bit) system, you should instead install Microsoft Visual C++ 2010 Redistributable Package (x64)
➤ The latest version of Microsoft DirectX that your PC supports.
➤ PSP ROMs (ISO). These are the games you will play. you can download here
How to Download and Install the PPSSPP Emulator
➤ Download the game/roms PSP here
➤ Extract to get the iso file
➤ Download The last PPSSPP for windows here
➤ After download, extract the zip file
➤ Run as Administration the PPSSPPWindows file
➤ If you have a PlayStation or XBOX controller for your PC, now is the time to connect it.
➤ Load the game by clicking 'Load' on the main screen of the PSP Emulator.
➤ Then navigate to the game's ISO path, and click 'Open'.
➤Enjoy the game.
To see full tutorial click here
How to install and play PPSSPP game on android click here