Arrrghh slow computer

My laptop is getting old - and I only bought it three years ago. So the feeling of not having gotten all you paid for is sneeking up on me. Three years and already too old... That kind of sucks. Now I'm trying different programs like Registry Smart and Error Nuker and then I'm hoping it helps a bit. Well, actually I already know it's helping but still it's just too early for an expensive computer too be out of date.