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3If you are removing an old module from a memory slot, spread the two metal tabs away from the sides of the memory module. The module flips up at a 30° angle.
If you are removing a module from the lower memory slot, you must first remove the module from the upper slot.
Upper memory slot
Lower memory slot
4Pull the old memory module out of the slot.
5Slide the new module into an available memory slot at a 30° angle, then press it down until it clicks into place.
6Close the back panel by following the instructions in “Opening and closing the case” on page 46.
7Return your computer to its upright position, then reconnect all cables.
8Turn on your computer. Windows starts and the Windows desktop appears.
9Click 
(Start),
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