Hello It's been three days with no results for my problem bringing back life to my brand new macbook air (mid 2011) here's my story, and i hope someone can point me to the right direction to solving this. once i bought my macbook i tried setting a windows 7 partition through bootcamp, all went well and windows was up and running in parallel to OS X Lion including a shared partition formatted in exFat, then i decided to change drive letters from the drive settings in "computer management" within windows 7, i didn't realize that this would break all associations of the partitions installed when i rebooted the laptop, once i restarted the machine i had only one partition showing on the boot menu which was "windows". In the past several days i tried everything and eventually ended up with deleting all the other dormant partitions that are "recovery HD", "EFI", "mac" through windows management. I also tried running gparted to try and fix the HD but gparted gets stuck and i can't run anything, i am only able to access or reinstall windows to HDD. I tried using the internet recovery by holding Command+R but internet recovery shows a revolving globe for a while then i would briefly get a progress bar for a split second then the globe would change to an alert sign with the message "apple.com/support -2100f". I tried looking up this error message but it's not referenced anywhere on the web and i don't really know what it means. can someone help me in understanding what this means and how should i approach this problem. Thanks.