Received a refurb iPad 2 from Apple yesterday. Set it up last night and can get only 3-5 minutes (sometimes less) of use before it crashes and reboots itself. The app doesn't seem to matter. Hooked up to my Macbook or not doesn't seem to matter. I just bought an app that gives a picture of the activity going on during use and most of the memory space is free. When doing a check with the multitasking bar (I think it's called) any app that I have used is still there even after I have quit it. One recommendation was to delete those apps showing in that task bar and then restart. Did that. Same result. Help please.