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i have seen this problem thousands of places but can't really figure out what is wrong.

i have a 2 year old Asus g74sx laptop which came with windows 7 preinstalled, now i have installed windows 8 instead and have changed a harddrive.

i now want to install Ubuntu alongside windows 8 to learn more about using linux and Ubuntu for my work. (note that i am very inexperienced when it comes to new OS's and especially Linux.)

so far i have made a bootable USB drive with Ubuntu 13.10 and when i boot Ubuntu and try to install it, it doesn't recognize my windows 8.

i have tried reading a lot on the internet to find a solution and first thing was i should just use the "something else" in the installer and choose a partition i could install it on. so i made 2 new NTFS partions one with 5 GB to install Ubuntu on and one with 110 GB to use for Ubuntu. now when i try and choose "something else" it just shows my 500 GB harddrive as free space??

i have also found something called gparted and some other stuff that may be the cause of the problem but i am in no way experienced enough to know how i figure that out.

i hope someone can help me! and many thanks in advance to everyone who takes their time to help!

share|improve this question
Interesting indeed. One possibility I can think of is that for some reason, your hard disk has 2 different kinds of partition tables (more technically, a hybrid MBR/GPT). Partition tables describe the partitions that are available on your hard disk. Very commonly, a partition table called MBR (master boot record) is used. But more recently, especially on computers preinstalled with Windows 8, may use the GPT partition table. On BIOS computers, Ubuntu can recognize both GPT and MBR, with GPT taking precedence. However, with the same setup, Windows only recognizes MBR. –  yjwong Jan 13 at 21:31
While booted into an Ubuntu USB drive, can you perform the following? 1) Connect to the Internet. 2) Open a Terminal. 3) Type sudo apt-get update && sudo apt-get install gdisk. This command updates the software database in Ubuntu and installs a utility to manage disks formatted as GPT. 4) Type sudo fdisk -l /dev/sda and attach the output to your question. 5) Type sudo gdisk -l /dev/sda and attach the output to your question. –  yjwong Jan 13 at 21:38
Thank you this worked for me now i have Ubuntu running like a charm alongside my windows 8! –  SoerenFrisk Jan 14 at 9:54

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