If you face issue with windows space management, Like if you have installed system and forgot to create partition or need to extend the partition then follow this step to create partition by yourself.
Assuming that you have simply installed Windows 7 onto the drive.
The Disk Management provided in Windows 7 has the option to shrink a partition, so it should be straightforward to reduce the size of the existing partition by the amount required to make room for the extra partitions you want. Then you can create those partitions in the resulting unallocated space.
Step 1: Click Start Menu –> type Run keyword in Search Programs and Files section, open Run in Programs.
Run dialogue box opens –> type diskmgmt.msc keyword –>Enter or click OK
Step 2: Disk Management opens, all the available hard drives, including the connected USB devices will be displayed automatically.
To create a new partition from a hard drive, you only need to right click the hard drive that you want to partition and select Shrink Volume
Step 3: A new dialogue box appears and informs about the used and free space of the hard drive. Input the size for the partition which is divided in the Enter the amount of space to shrink in MB box.
Tip: Create a New Partition on a Windows 7 Hard Disk
Name the new partition and click OK.
Step 4: After creating a new partition, re-format the new partition.
Right click the new partition –>New Simple Volume
Step 5: Click Next, a dialogue box will display the size of the new partition –> Click Next
Step 6: Select an icon for the new partition, click Next
Step 7: Name the new drive Volume Label –>Next
Step 8: After finishing the setting, click Finish to close this window.
Return to Disk Management window, the new hard drive partition has appeared. To be certain, check the partition to see whether it has appeared in Windows Explorer or not.