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After some problems trying to install Ubuntu alongside Windows 7, now I have Windows 7 installed and it works just fine. But when I am going to install Ubuntu it doesn't recognize my windows.

What should I do to see Ubuntu in my PC? My Ubuntu version is 12.04 64 bit.

PC specs:

Asus crosshair IV formula 
AMD phenom II x6 1055t @ 4.1GHz
Corsiar 4x2Gb 1766 @ 9-9-9-24
AMD Radeon 7870 GHz edition
WD 1TB caviar black  
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what do you mean it doesn't recognize my windows? –  Soroosh129 Mar 7 '13 at 16:33
    
After boot when ubuntu coming up it says you don't have any OS installed on your system while i have windows 7 ,so there is no option like install ubuntu along side windows 7 !! –  Ramin Mar 7 '13 at 21:32
    
Ubuntu doesn't care if you have any other operating systems installed, can you provide a picture? –  Soroosh129 Mar 8 '13 at 0:51
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5 Answers

It might be there, just not showing up yet in Nautilus. Try mounting the drive.

UUID=Put_UUID_Here /media/win ntfs rw,auto,users,exec,nls=utf8,umask=003,gid=46,uid=1000 0 0

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I fail to see how the samba share part is relevant, they're not trying to mount a share. –  Thomas W. Mar 7 '13 at 18:22
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The usual cause of the "missing partitions" problem is one of two things:

  • A damaged partition table -- On an MBR disk, my FixParts program can usually fix such problems. See the FixParts page for details on how to use it. It's usually just a matter of launching the program on the disk, typing p to verify that it's detected your partitions correctly, and then typing w to save the fixes.
  • Leftover motherboard-based software RAID data -- This can usually be fixed by typing sudo dmraid -E -r /dev/sda, IIRC, changing the device filename as necessary. You may also need to go into your firmware setup to disable RAID. Of course, if you're actually using RAID you should not do this!
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When installing Ubuntu, choose the Something Else option. (on the bottom of the screenshot below)

enter image description here

This will show your Windows partitions, and allow you to install Ubuntu on other partitions. See https://help.ubuntu.com/community/GraphicalInstall#Installation_type

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You say: "when I am going to install Ubuntu it doesn't recognize my windows". This suggests to me that your problem is similar to the one described, for example, in this question: Dual boot ubuntu 12.10 and windows 8 Dell Inspiron 15 r

If so, the answers to that question may be helpful.

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Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. –  Braiam Aug 11 '13 at 22:28
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I had the same problem with my laptop that originally have Windows 8 (using GPT) that I installed Windows 7 (using MBR) on. I found the solution here...

http://ubuntuforums.org/showthread.php?t=1604074&page=4&p=10022223#post10022223

After so much time messing around with Windows, Ubuntu feels great!

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Welcome to Ask Ubuntu! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. –  Braiam Aug 11 '13 at 22:29
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