BSOD still after format

And we arent only talking about bsod, im saying all errors have disappeared after i remoeved my other ram from computer, heres the list of errorst and crashes i got nearly everyday with both in my computer:

League of legends launcher (Michrosoft c+ blabla has stopped working)
League of Legends ingame (dont remember what came)
Cod4 (cod has stopped working)
cod mw3 (codmp has stopped working)
cs:s (hl2 has stopped working)
firefox (firefox has crashed and blablabla)
adobe flash player (flash player has crashed blabla)

i only tought it was like esl wire and logitech driver couseing bsod, but now when all these errors hasnt comming after i removed 1 ram i think im pretty sure its something else whats wrong, 4 months old computer, so.

Yeb, i called the store that sold me the ram sticks, and they took a look at this and 2 days after i let them have my ram sitck they called and said the one was demgaged, bugged or something like that, he didnt knw 100% what was wrong, but it was the ram sticks, i get 2 new now and my computer is running like it should be running now :) no errors, no bluescreen no nothing, so ty guys

Yeb, i called the store that sold me the ram sticks, and they took a look at this and 2 days after i let them have my ram sitck they called and said the one was demgaged, bugged or something like that, he didnt knw 100% what was wrong, but it was the ram sticks, i get 2 new now and my computer is running like it should be running now :) no errors, no bluescreen no nothing, so ty