Need help with a new processor

Okay so I really know nothing about computers at all i just like to play games on them...

So, I have an Alienware M11x that I got like 3 years ago (bad computer, ik, but idc). I want to get a new processor, because now games just go extremely slow for no apparent reason and I'm assuming it's the processor. My problem is that I don't know what processor to pick, if it has to be a certain kind, and if it is hard to install.

My current processor is: Genuine Intel (R) CPU U7300 @ 1.30GHz (2 CPUs), ~1.3GHz
I just copied whatever it said on dxdiag.

I was just wondering if someone could recommend something from $60-100 that is better than what I have.

isn't Alienware M11x a laptop? How the hell are you planning to even replace that one without solding? Also, it's pretty old, so it will be hard to find anything you could upgrade it with, so it's better to save up some money and build a pc eventually.

It's a laptop; 99% chance it isn't upgradeable. Your motherboard is too old btw, since it's from about 3 generations back which they don't produce anymore.