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i have Acer Aspire S3 with windows 8 preinstalled, successfully updated to win8.1. Then I wanted to have dual boot with Ubuntu, I figured how to turn on and off the secure boot, switch between UEFI and Legacy, but the only way I could boot my Ubuntu USB was in Legacy mode, so I installed it, but GRUB failed to install and Boot-Repair couldn't help it either. So I tried to use EasyBCD to create an entry for Ubuntu in Windows bootloader and I accidently deleted the original Windows 8 entry. I created a new one for Windows 8, then I turned off the computer and my Windows can't boot ever since. No matter UEFI or Secure Boot, I only get to see the Acer logo and then the screen turns black and the computer reboots. Over and over. So I downloaded the EasyRE, a recovery tool from makers of EasyBCD, created a bootable USB using Rufus but as I wrote earlier no USB could boot while in UEFI and as it had to be made specially for EFI systems, it didn't boot in Legacy by default. I even tried to add .efi file from the EFI partition of Windows to "trusted files" but that didn't work either, since I didn't know the key.
Has anybody experienced anything simillar, or can anybody please help me? I don't have Windows Recovery USB nor external CD/DVD drive to try to use instead of USB (and I doubt it would work). Should I restore secure boot to factory default? Does it delete the key I already had, but lost? And what does the restart of battery do? And I don't want to delete the Windows due to warranty.
Thanks a lot in advance and sorry for my bad English! (:
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