Hello, I've got an early '10 2.26 13" macbook pro, the only upgrade to it so far has been a 500gb WD blue hd. The thing has some persistent lags, stutters, and beachballs.... it's become a pain in the butt to use. Sometimes typing, just typing, laggs and stutters. right now i have chrome, safari, adium, ical, evernote and skype open, and it still acts like an ancient computer. i have verified and repaired the disk... no significant improvement. there were errors but they got repaired. .... what is slowing down my computer? how to fix/diagnose it? it "only" has 2 gigs of ram... should i install more? thanks, r.