I've only just discovered that I need to instal a New OS on my mac and I'm very nervous about how to go about doing this as I use the windows side on my imac for work and I'm so used to how it runs with XP, and so settled in outlook express (not outlook). I'm not sure where to start with this. I currently have XP with office 2007. I have an imac 27 inch, iMac10,1 IntelCore 2 Duo Processor speed 3.06GHz Processors 1 Cores 2 L2 cache 3MB Memeory 4GB Bus Speed 1.07 GHz Boot Rom version IM101.00CC.B00 SMC version/system 1.52f9 Not sure which version of bootcamp we have Not sure whether to go for win7 or win 8, if win8, which one? pro or basic? Not sure whether to go for 32 bit or 64 bit Not sure where to start and what to expect Not sure which IE to instal on upgrade Not sure how to get OE back Not sure which anti virus to instal - currently using free MSE Do I decide which windows, then buy it, then run in bootcamp? Guidance would be much appreciated. Thank you.