Dell Inspiron 531 RAM Issues

!#8# Dell Inspiron 531 RAM Issues

Somehow that computer has running extremely slow with Windows 7 on their, it can go up to 4 GB of RAM. This computer won't detect the second slot with the other 1 GB slot each slot can hold 1 GB each and the first slots are and the other two are blue. I tried everything I could to have them both working nothing work. What should I do and I really need some help to get this thing work again.

Dell Inspiron 531 RAM Issues

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