I recently purchased a macbook from Best Buy, and got it on discount as it was an "open item". It was returned by the original buyer because it didn't have a PCMI slot on the back. Anyways, the laptop is working great. However, it was on display for about a week and a half before I purchased it. Thus, it has a user account the great folks at BB created that I can't seem to delete, although I did create a new user account in my name. Any advice on how to delete this account? Also, since I've never owned a laptop before, I'm a little skittish with it. I own an iMac and keep it in sleep mode for consecutive days and usually shut it down once a week. I wondering what the consensus is with the macbooks and macbook pros? Also, is it ok to let the battery run completely down before recharging it, or should I be recharging it when it gets to a certain percentage? I'm finding myself plugging it in when it gets to around 50 percent. Thanks.