A decent pre-built gaming pc under 600?

I'm looking for a decent/average desktop for gaming. Not looking to be able to run newer games or max settings or even full 60 fps.

Games I want to play:
Minecraft
Skyrim
Everquest 2
Runescape

And other various games like that.

I'm fine with low fps and playing on lowest graphics settings.
I DO NOT WANT TO BUILD A PC, so please stop saying to build one.

Prefer something available on walmart or amazon.

I want to spend a maximum of 600$ including shipping fees and a monitor (which I can buy for next to nothing.)

Please help me out here.

Added (1). Oh and I prefer windows 7, windows 8 is a bit of a joke and nearly as bad an OS as vista was.

Albert Meadows

Any machine that beats these:
Skyrim Specs: (Video Graphics is where most machines fail the test)
You Do need a machine that meets these requirements for Skyrim.
Recommended
•Windows 7/Vista/XP PC (32 or 64 bit)
•Quad-core Intel or AMD CPU processor
•4GB System RAM
•6GB free HDD (Hard disk drive) space
•DirectX 9.0c compatible NVIDIA or AMD ATI video card with 1GB of RAM: Nvidia GeForce GTX 260 or higher; ATI Radeon HD 4890 or higher
•DirectX compatible sound card
•Internet access for Steam activation
•
Minimum (get by with) System Requirements
•Windows 7/Vista/XP PC (32 or 64 bit)
•Processor: Intel Dual Core 2.0GHz or equivalent processor (AMD Sempron @ 2.4 GHz)
•2GB System RAM
•6GB free HDD space
•Direct X 9.0c compliant video card with 512 MB of RAM
•DirectX compatible sound card
•Internet access for Steam activation

Mikel