Try these:
1) Update drivers, Windows updates, DirectX Web updater (some components may be missing), and latest version of Visual C++
2) Make sure under Power Management in Windows you're running in High Performance, and have a high performance profile set up under Nvidia Control Panel (Read this: https://forums.dolphin-emu.org/Thread-unofficial-laptop-performance-guide)
3) Use the OpenGL backend on one of the latest dev builds, as it is faster than D3D. The current dev build is 4.0-705 (Also try build 4.0-614 with OGL and the Vertex Stream Hack)
Just so you know, your CPU is a bit outdated when it comes to Dolphin. See if you can overclock it (use Google to see if your motherboard supports overclocking, and how to overclock)
1) Update drivers, Windows updates, DirectX Web updater (some components may be missing), and latest version of Visual C++
2) Make sure under Power Management in Windows you're running in High Performance, and have a high performance profile set up under Nvidia Control Panel (Read this: https://forums.dolphin-emu.org/Thread-unofficial-laptop-performance-guide)
3) Use the OpenGL backend on one of the latest dev builds, as it is faster than D3D. The current dev build is 4.0-705 (Also try build 4.0-614 with OGL and the Vertex Stream Hack)
Just so you know, your CPU is a bit outdated when it comes to Dolphin. See if you can overclock it (use Google to see if your motherboard supports overclocking, and how to overclock)