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I have a new laptop (asus F550LA 15.6") intially with win 8. When i had downloaded updates and had 8.1. I used windows to shrink the C partition as much as I was allowed (to 150 GB) deleted "data partition" and installed Ubuntu beside windows.

All well, except that a) I don't like windows 8.1 and it is too large, (b) there are now an awfully large number of partitions on my hard disk: 8, only 3 of which are for Ubuntu. Three "partitions" before C (system, recovery and ?, and 1 (recovery) after the Ubuntu partitions. That's ridiculous!!

So I want to erase everything, install Ubuntu again on the entire disk. Problem is, the option is no longer there. I get options: 1) Update Ubuntu 2) Erase existing ubuntu and install again 3) Other No option to install on entire disk.

Please tell me: If I erase all partitions in the "other", and make only my three Ubuntu partitions, will I have trouble with UEFI? (Confirm-SecureBootUEFI -> True)

I have read for instance Installing Ubuntu on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported) which really only made me even more nervous.

Sorry this was long, but I ruined a laptop in 2011 because of the UEFI/EFI issue, which I still don't understand, so I really want to be a little cautious.

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Have you tried erasing everything using Gparted? –  Raphael Jun 23 at 13:31

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