How to resize any partition in Windows Vista without formatting

Here is the procedure to change the size of any drive on your PC. 

• Go to Start-> Run. Type Diskmgmt.msc and hit Enter.
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• Now right click on the partition you want to resize. Select Expand if you want to increase the drive size or Shrink if you want to reduce the drive size,
• Enter the amount of size by which you want to expand or shrink the drive. Your Windows will immediately resize the partition for you