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In my PC (2 GB RAM, 160 GB HDD) I have Windows 7 in Partition C (20 GB). I have tried Ubuntu 12.04 from Live USB. I now want to replace Windows 7 with Ubuntu 12.04 in the same C Partition without affecting the other partitions and their contents. I have read the answer to a similar question but still do not feel confident. Like in that question, I too have proceeded till "Something Else", but then precisely what steps should I take? Is it possible to simply choose the C Partition and start installing Ubuntu there? In that case what other choices should I make?

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After something else:

  • Select Windows partition and click on "-"(which is beside the "+" icon).
  • Now it shows it as an unknown partition. Click on "+" button. You'll get a window to manage that memory.
  • Choose: "Primary partition", "Beginning of the memory space". Size as (8-9)GB. (1-2)GB is left now as free space.
  • Select 1GB space and click on "+" icon and choose options like this: "Primary partition", "Beginning of the memory space", "swap area".
  • Click install.
  • Comment.
  • Can I ask some more information? There is also a small partition named "dev/sda1 Windows 7 (loader)" of 100 MB size -- should I delete that as well? Secondly, what do I choose for "Device for bootloader installation"? Is it dev/sda, i.e. the whole 160 GB HDD? Or is it the newly created partition where Ubuntu is going to be installed? – user255726 May 10 '14 at 7:54
  • 1. YOU SHOULD NOT DELETE 100 MB PARTITION. 2. BOOT LOADER IS WHOLE HDD i.e. DEV/SDA. 3. EVERYTHING SHOULD BE FINE... – MANI May 11 '14 at 16:52
  • You mean I shouldn't delete the 100 MB Windows loader partition even though I am completely removing Windows?? Thanks for the Bootloader information. – user255726 May 12 '14 at 6:35
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    Sorry! I didn't read the question clearly. If you're completely removing Windows you can delete that partition as well. – MANI May 12 '14 at 6:59
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Just create a bootable USB of Ubuntu ISO file. (Make sure your important files are not in Windows 7 partition)

Restart your PC and boot up your USB. While installing, select "Replace Ubuntu with Windows 7"

That's it!

  • No, I am afraid that's not the way, for it will erase all other partitions with their contents! – user255726 May 9 '14 at 16:06

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