I´m sorry to tell you that your CPU is not enough for the game. Ultra low voltage CPUs (those whose model number ends on U) are not a very good election for Dolphin. Anyway, you can try TurboBoosting it (if the function is available) for a small improvement.
Rig 1: Windows 10 Home | AMD A6-1450 @ 600/1000/1400 MHz | AMD Radeon HD Graphics 8250 | 4GB RAM | HP Pavilion TouchSmart 11.
Rig 2: Windows 10 Pro | Intel Core i7-2640M @ 780/2800/3500 MHz | Intel HD 3000 Mobile | 8GB RAM | Dell Latitude 6320.