I have Windows 8 installed on a separate partition which I want to replace with Windows 7 and Ubuntu 12.10 installed on a separate partition. I want to do this without losing grub.

How should I do it?

  • Is system BIOS or UEFI? If BIOS based instruction posted will work. But if UEFI you need to convert Windows 7 installer to flash drive and also convert it to UEFI mode. Otherwise a Windows installer will auto convert entire drive to MBR and create all sorts of issues. – oldfred Nov 13 '13 at 5:01
  • Open gparted partition editor,in ubuntu and delete the windows 8 partition and format it to ntfs filesystem.

  • Download boot-repair live disk .iso file,and make a bootable boot-repair live usb.

  • Insert windows 7 installation disk,and install windows 7 os on the deleted windows 8 partition.

  • After that insert boot-repair live usb and boot from it.On startup click on the Recommende repair option.It will reinstall your grub.


if u wont use windows often try to install it within virtual box , for reference goto

how to install windows on ubuntu using wine

other wise for dual boot goto

how to install windows after ubuntu for dual-boot

hope it is what u want.. if i was u , i wud definitely go with second option for dual-boot..

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