Use a plastic tool and an anti static gloves to pull out the memory modules.

If you have not, then hold the board only at the ends.

If you plan to make an upgrade, first of all check the specification of yours model. Depending of the Chipset and the producer, every laptop have a limit of the expansion of the RAM memory.

Check exactly type of the used memory modules. This models use DDR3 technology.

You can use modules with a different speed but the processor will work with them at the speed of the slower one.

Some modules will not work together.