How to create partition without formatting window in Window 7

1:- Firstly  press "Windows+R" button and type “compmgmt.msc” .

2:-Now Choose “Disk Management” on left panel.

                                                   

3:-Right click on any enough(regarding space) disk and choose “Shrink” option
.

4:-Then enter the amount of new disk(as per required you) then press “ok”.