Hi there, I have a 2011 MBA 13". I'm still new to the Apple world and haven't had a great amount of time so far to get to grips with my still new toy (Having been a long time Windows user). I want to upgrade my MBA from Lion to Mountain Lion. I know to download this upgrade through the app store. My question is; do I need to create any system restore type discs prior to upgrading to ML? (In my windows setups, I always create the system restore discs when setting up a new machine). If something were to go wrong in the future (with my MBA), how does one go about getting your machine back to its factory settings. Thanks for any help. Regards, DB.