Defrag option to Windows 7 , 8 right click context menu

Press "windows" + r to open Run and type regedit to open Registry.

regedit

Naviagate to :

HKEY_CLASSES_ROOT \ Drive \ Shell

HKEY_CLASSES_ROOT \ Drive \ Shell
Right click on the Shell key and create a newkey and name it runas
Right-click the default key and select Edit Value, type in the Data section Defrag and confirm with OK.
Right on key runas, created in the first step, and create a new / given key name command
Right on the default key Information section and select Edit Value, type defrag% 1-v Confirm with OK.
Exit Registry and restart.