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I have three operating systems in my laptop: Windows 7, Windows 8 and Ubuntu.

I installed Windows 8 just to test it (I should have installed into a virtual machine...), but now I want to remove Windows 8 and merge the partition of it with the partition of Windows 7.

Is it possible to do that without formatting the computer? What tool should I use?

Thanks in advance!

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Assuming that your first partition is Windows 7 and the second is Windows 8, you can do this just using tools coming with Windows 7:

  1. Boot Windows 7
  2. Open the disk management
  3. Simply delete the Windows 8 partition
  4. Resize the Windows 7 partition to use the now available free space

However, if you have some partition layout where the Windows 7 partition comes after your Windows 8 partition or if they are not "neighbors" at all (e.g. first Windows 7, then Ubuntu, then Windows 8), you would have to boot a linux-based live system like gparted or parted magic to move/delete/resize partitions. Be careful though to not mess up your system.

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They just need to be "neighbors"? Should I format the Windows 8 partitions before add it to windows 7 partition? – amp Aug 25 '12 at 19:28
    
If both partitions are located next to each other and the Windows 7 partition comes first, its file system can be easily expanded to use the free space from the deleted second partition. Just follow the 4 steps and you should be done - formatting is not necessary. – speakr Aug 25 '12 at 22:03

I highly recommend Gnome Partition Editor.

It can perform actions with partitions such as:

  • create or delete
  • resize or move
  • check
  • label
  • set new UUID
  • copy and paste

Manipulate file systems such as:

  • btrfs
  • ext2 / ext3 / ext4
  • fat16 / fat32
  • hfs / hfs+
  • linux-swap
  • nilfs2
  • ntfs
  • reiserfs / reiser4
  • ufs
  • xfs

And many more features

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Isn't a problem if the two partitions have operating systems? This tool can do that without problem? – amp Aug 25 '12 at 19:30
    
Gnome Partition Editor is a bootable CD. By booting off the CD, you have complete access to all the disks and partitions, regardless of what is on them. – Keltari Aug 25 '12 at 19:33

Simply delete the Windows 8 partition, set the Windows 7 partition to active, and reboot.

Some great programs that can easily do this for you

gParted live cd

Norton Ghost

Acronis Disk Director

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