A:
I'm not sure I Have the correct answer. I went to purchase the 520 which was on sale, they didn't have it in stock, but had the 530. I was told it was a slight difference in the processor speed. The one they had in stock was 50.00 more. Which I bought, then as they were transferring my info they burnt up 2 hard drives in 2 new computers, was lead to believe it was perhaps a defective batch of computers which I now don't think it was, I think it may have been something they were doing wrong so now I DON'T HAVE THE ALL IN ONE I wanted, I went to a desk top that they sold me as windows 8 with touch screen, so I bought a new monitor too. NOW I'm finding out not all windows 8 systems are touch screen.