Actually, you do not need the third party software to resize partition in Windows Vista because it has the built-in feature that allow you to do such thing. But, not for Windows XP, you need the third party software like EaseUS Partition Master Home Edition to do it for you. It is the free software from EaseUS and compatible to use in Windows 2000 / XP / Vista and Windows 7.
In my case, I need to resize the Windows XP’s disk partition (drive C: @ system drive) in my client’s laptop to become bigger. So, I think maybe it worth to give a try to this software.
What You Need
How To Use