PC buying advice

So, I am a Mac user (and a WP owner, go figure). I need to buy a PC laptop to run QuickBooks Premier desktop, which is not available for Mac. I do know how to use the Windows OS.

I need something simple & cheap. I'd say no more than $500 (US), but hopefully less.

Basic requirements:

-Must be 2.4 mgz or higher
-Windows 8.1
-Smaller the better, 11" screen is ok.

I'd appreciate any advice. Thanks.