Rekordbox 4.1 Help

Hello guys,

I'm in some need of serious help here, yesterday I received the new DDJ-RB controller with rekordbox license key, after installing everything and setting up I literally can not play 2 tracks at once, the software just crashes and the audio turns so distort it's unreal, now assuming it's my laptop I did a fresh install of Windows and tried again to no avail, the processor is AMD A8 Quad Core.
Next I tried on my desktop which has AMD Athlon II 3GHz X2 and it's a lot smoother but same again audio distorts massively, I've read that Rekordbox doesn't support AMD?

So my question is this, I have a budget of only £500 for a new laptop, could people recommend me a laptop with a processor that will be powerful enough for this software? There is so many different i5s and i3s I'm lost on what too look for now.

Thanks for your replys in advance, help a guy out!