Hi, I've been having this discussion with my friend, and neither of us really know about the differences between desktop and laptop processors aside from that they have lower voltages and smaller ...

Help! I'm lost and at the mercy of computor salespeople...I am buying a desktop for my 11 year old and both salespeople sound good to me. For the same price, which is better: A Pentium 4, 1.5GHz,40.0 ...