I have an old HP laptop with Windows 7 on it. It has 2 slots of DDR3 RAM. Today i have tried to add 2 gb ram to 4 gb of ram from the factory, so i could have 6gbs. After i did it i run my computer, went to task manager and saw that 3.1gbs are reserved for windows. Before i had only 1.1gb reserved. Which means those extra 2gb are being used by windows. Can someone explain me what is the problem? Why windows system took 2gb of extra RAM i have put. Waitign for answers, Thank u!