Contents Download Get data back ntfs 2 31 files - TraDownload . Related Articles I installed Ubuntu 11.10 on a newly bought Lenovo ThinkCentre Edge 71 (model: 1577-G3G) with EFI boot enabled. I opted for the Use Entire Disk option. Even though the installation process went without any problems/errors, when rebooting it now just gives me:No bootable operating system. Insert bootable disk and press any key...I figure this is because of EFI.Regression:I have checked the System Setup (F1 during POST) to find a BIOS option to disable EFI/UEFI boot, however, there is no such option for this machine.This might be caused by a Secure Boot feature in the BIOS.The hardware vendor does not know of any such...