Started noticing my laptop was running slower than normal. It just turned 4 years old but its still kickin. 64 bit, windows 7, and whats supposed to be 4gbs of ram. When I noticed it was running slower I looked in dxdiag and noticed on 2gb was showing up. Ran the memory check and nothing came up. Should I just go buy a 2gb or 4gb ram chip that'll work with my computer and give it a go? Hard drive still has plenty of space on it, no viruses or anything.