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I have Windows 7 as my default OS and 500 GB Hard Disk.

Following is the partition table of my Hard Disk:

partition table

I have installed Ubuntu with "install inside windows" option.

  • sda1 is the System Reserved space for Windows 7
  • sda2 is the Windows partition (C: Drive)
  • sda3 is the Partition inside which I have installed Ubuntu, i.e., it is installed in a folder called Ubuntu. I also have some other files in the 200GB partiton
  • sda4 is the common drive where I store all the stuff like Music, Movies, Projects etc.

Now the problem is I have allocated only 25GB as the default installation size in WUBI installer. But I want to increase the size from 25GB to 75 GB or more without losing any files neither in Windows nor Ubuntu.

How do I do that?

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