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I'm a newbie (I'm a programmer but I'm just trying to work with Ubuntu!) and I've got a very seriuos situation...I explain myself:

I have an asus n550JV and it has EFI boot.....I decided to install Ubuntu next to windows 8 (I have a partition with Windows 8 and some other partitions that windows 8 needs to work fine + a rescue partition) so I followed the official guide....Since that everything fine....One day I decided to remove ubuntu and leave just Windows 8, so I went on windows and as I always do, I deleted the partition(and the related so also the swap) on Windows....Now when I enter in Bios there is yet a boot option called "ubuntu" that is referred to the hard disk and that doesn't work(I've deleted the partition so when I ty to use that there is as "usual error: no such partition. grub rescue>").....I tried everything to remove it(from bios I entered "remove option", from windows I used EasyBCD 2.2....); one more thing: I can't use anymore the USB live/CD live because the boot doesn't recognize them as before(when I first followed the guide I disabled the secure boot and then I could try Ubuntu with Uefi mode; right now I can use the USB live only if I enter in legacy mode, but obiuvsly all the kind of operation that involve Uefi aren't good because I started ubuntu in legacy mode ).....So now the question is how can I install again Ubuntu? I really need it! And above all, How can I let work the USB live? Thanks everybody and help me!

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Do you want to install Ubuntu again, or restore Windows? –  Richard Sep 25 '13 at 21:36
    
Windows works fine, but I'd like to install Ubuntu again as before, next to Windows! –  user2078694 Sep 25 '13 at 22:26
    
I have an update! I've done again the USB live creation and now I can access the entry "Try without installing"....But yet I can'tdelete the entry ubuntu from boot also after using the bootmgr in ubuntu.....Any suggestions? –  user2078694 Sep 26 '13 at 11:30

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