Probably it's good but i don't think the processor's speed is good (2.0 GHz) ??? If you wish then you can buy it or in my opinion try to buy a computer with 2.44 GHz or more... It will help you to play games in a better speed without lag...
1)Probably you should try to re-install your windows and format your hard disk. Try using Windows 7 Ultimate.
2)I think you should press F8 at the starting and use the windows in safe mode... If you are successful to open your system then try to update your Atheros PCIE Ethernet Controller. it...