Enter the amount of space to shrink in megabytes (MB). Remember that .
To create a new partition, you must first create "Unallocated Space" by shrinking an existing volume (usually the C: drive). disk partition windows 7
This is the most common scenario. When you boot from the Windows 7 DVD or USB, you will reach the "Where do you want to install Windows?" screen. Enter the amount of space to shrink in megabytes (MB)
If you have a partition that is running out of space, you can extend it using adjacent unallocated space. How to Partition a Windows 7 Hard Drive disk partition windows 7
To create a new partition, you generally need to take space from an existing one.