Delete OS Dualboot To Unallocated Space

jammyflow13

New Member
Hello mate..im new here..:)...!!I recently got a problem with my computer ...!my (windows vista) did not work properly ...! without the knowledge I have intall windows seven and make dualboot ....!!
but I did not create the partition first...!
so I installed (windows seven) on drive D..!!
after a while when booting process can no longer be dualboot because my computer has been hacked by hackers ..!
now I want to install windows seven as dualboot back to create partiton first ..!
because on disk management does not have a visible (unallocated) space ...!both drive C and D is determine actived..!!
how I wanted to create a new partition ...!
is it safe if I delete windows seven file on drive D..!
or how do I just (unallocated) space to create a new partition to install windows seven dualboot again..!!
 

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