I have a late 2010 macbook air. I wiped the ssd and had apple reinstall lion and mountain lion after I purchased it. I did a partial time machine restore, meaning both times I tried to restore from the external, the process froze at less than a min remaining and did nothing for like 40 minutes until I turned the computer off. I then powered it back up and went through the welcome screens and created a user..after it all powered up I realized it had imported my user from my other computer and all the settings, docs, files, etc. I now have two users and I want to delete one, but every time I try to through system preferences-user accounts, the rainbow beach ball comes up and does NOTHING. Any help????