Will out this here as I don't know where else it should go. I have just bought an ex-lease computer from gum-tree, the idea being I can sit it in my workshop and run my lights from it. I can also set it up for testing things as I build them. It will then be used at Christmas to run my display. The issue I have is, it came with no operating system, and I don't know how to load one up. Can I buy the $10 licences keys from ebay and download windows? Then how do I make a not disk! (I have read about the process but not 100% sure) Or do I just buy the who thing from Harvey Norman and chuck a disk in that way? Any advice?