We know that we get option of our hard disk partition during windows installation. But what if we want to repartition our hard disk after windows installation. Here is the method:
1. Login as administrator.
2. Navigate to:
Start -> right click My computer -> Manage
3. Computer management page will open
4. Select "Disk Management" under "storage"
5. Right-click the volume you want to shrink, and then click Shrink Volume.
Follow the instructions on your screen...and you are done.
Note: This applies only Windows Vista.
For Windows XP, use third party software like Magic Partition.
actually this is a little bit common for computer geek but a great help for newbie
btw, I use Norton Partition Magic to partition my hard drive because its very easy to use