To resize a partition with Windows Vista / Windows 7 / Windows 2008, follow these steps:

Be sure to back up any valuable information, because there is a slight chance that data can be lost when dealing with partitions.

1) Click on the Start menu

2) Right click on Computer and click on Manage.

3) Open up the Storage category and click on Disk Management on the left hand panel.

» Read more: How to resize a partition in Windows Vista, Windows 7 and Windows 2008.