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I am using a dual boot system with Ubuntu 13.10 and windows8. I have a 64 bit hp pavilion g6 but when I last installed my win8 I installed a 32 bit OS, and then I installed my ubuntu over my win8. Now my workload on the win8 workspace has slowly increased and the 32 bit os operation is becoming a problem, plus the hardware reserved RAM for the 32 bit OS renders most of my RAM unusable. So I want to format only my windows partition and reinstall a 64 bit OS over there. Is it possible? If yes, how do I do it??

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Yes, for how? part please upload the gparted screenshot. –  Avinash Raj Mar 1 at 11:34
    
what do you mean by gparted screenshot? or rather what is "gparted screenshot"? How can I get it? –  ubuntu_noob Mar 1 at 11:39
    
Boot into Ubuntu search for gparted partition editor in dash.If it was not installed on your's, then install it by running sudo apt-get install gparted.Open the gparted partition editor.Take a screenshot of it.Post the screenshot on your question. –  Avinash Raj Mar 1 at 11:42
    
Okay, thanks...doing it..:) –  ubuntu_noob Mar 1 at 11:43
    
The gparted screenshot is link –  ubuntu_noob Mar 1 at 11:55
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1 Answer 1

  • Through the Gparted partition editor, first format /dev/sda3 partition to ntfs filesystem.Before formatting, make sure that your /dev/sda3 partition wasn't mounted.

  • Now boot Windows installation disk and choose custom option on startup.

  • Install Windows on the formatted ntfs partition.

  • Because of the installation of Windows, grub will be overwrited by Windows boot manager.

  • For this you have to run Boot-repair.

  • Now both Windows and Ubuntu options will be appear on the grub.

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