Bloody nuisance these laptops are & they don't need any screws as they stay together just as well with every screw taken out.I wanted to change the processor fan as it had failed but it was impossible to get the heat sink out so I thought bollocks to it I ended up scraping it for parts as these things are deliberately designed to be as difficult as possible to repair. I wanted to use it for Linux. Government tells us we need to repair & upgrade to save resources but these crooked companies want you to buy a new machine every year. They should be fined for this practice especially in today's shortage of resources. I have opened many laptops , changed processors DVD drives etc but this one open was impossible to do what I wanted the heat sink would not come out even with every screw out.