I have a need to run a Windows program but I moved to a MacBook Air last year. It is an i7, 256GB SSD with 8GB RAM model. Currently it has circa 40GB free but I could increase that if need be. I know nothing about installing Windows on my Mac other than it is possible. Where would I get Windows from? Which version should I get? Is XP still available? How much storage would I need to devote to the Windows partition? Is the process reversible? What are the risks as my Mac is just perfect at the moment! Maybe I should consider getting a really cheap Windows laptop or computer just to run this programme that I need?