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I just bought an asus notebook. It had no OS-s installed so I did the following to it. I installed win8 in uefi mode. I then added ubuntu to the mix. I installed it in uefi mode too using the guide at: http://www.linuxbsdos.com/2012/11/05/dual-boot-windows-8-and-ubuntu-12-10-on-uefi-hardware/

I have gone as far as running boot-repair on my installed ubuntu, and have not used the EasyBCD part. I can now dual-boot ubuntu and win8 with no problems using GRUB2.

My question is the following: if I want to remove the dual-boot setup and install just ubuntu, can I use the ubuntu liveCD and choose the erase disk option? I know this will remove all my data, but that is allright. My fear is ending up with an unbootable machine. Can that happen?

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Yes, you could have a data loss. You should make a backup of the full disk with something like clonezilla.

After that you should try to enlarge your linux partitions with Parted Magic.

Maybe you could make the backup with Parted Magic too because it contains already clonezilla.

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Hi. Thanks for the answer. Given that my ubuntu install seems broken, what I want to do is remove both windows and ubuntu, and make a fresh ubuntu install (no more dual-boot). Assuming I don't care about losing any data, can I just insert the ubuntu liveCD and choose the erase disk and install ubuntu option? Will this have some undesired effects on my system? –  Niteloser Jul 15 '13 at 11:14
    
@Niteloser yes, you can make a fresh install and you will not have any undesired effects. –  Luigi Jul 15 '13 at 13:34
    
Worked briliantly with the install. Sadly ubuntu seems to have gone belly-up after a first reboot (the reboot after the installer's reboot). I have no idea what's wrong with it. I might try installing the LTS version or maybe mint. Thanks alot. –  Niteloser Jul 16 '13 at 10:31
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