when i try to install windows 8.1 o.s to my laptop.it shows that the required cannot be selected showing something like drive 0 cannot be installed.i my Ubuntu o.s is in u.e.f.i mode.and the entire o.s is in a single partition which is under the owner of root..i cannot unmount the drive.
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goto http://superuser.com we love ubuntu and want ubuntu to replace windows not vice versa – Faizan Akram Dar Mar 09 '15 at 17:59
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I think you need to convert your hard disk from UEFI to MBR format. You can follow the below steps:
- Boot in the Windows installation using DVD or USB.
- From inside Windows Setup, press Shift+F10 to open a command prompt window or you can go to Repair your computer >> Advanced Options >> Command Prompt
- In Command Prompt, open the diskpart tool:
diskpart
- Identify the drive to reformat:
list disk
- Select the drive, and reformat it:
select disk "disk number"
clean
convert mbr
exit
Continue with your Windows 8.1 installation. Your problem should be solved by this.
Alternatively you can also convert your UEFI/GPT harddisk from ubuntu and then install Windows 8.1. Have a walk through GPT/UEFI to MBR conversion
Dhaval Simaria
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You're welcome. Since you're new here, please don't forget to mark the answer accepted whenever it helped (most) in solving the problem. – Dhaval Simaria Mar 26 '15 at 08:38