After seeing an Internet video with detailed installation instructions, I ordered the part immediately. Loosen the seven screws on the bottom plate, of course, before the battery out, herausclippen the old memory, pure and re-screwing the new one. The RAM was immediately recognized and the Windows Experience Index schnepste three comma nochwas to 5.1. The boot time decreased and everything runs much smoother. Loss of warranty is also not to be feared. A must for anyone who has ever had a screwdriver in his hand.