plz tell me ,,,,how to combined two logical drive to one drive
If you mean one drive partitioned into two and you want it reverted to a single drive, move the contents of the second drive to the first and use Disk Manager to delete the second Partition. Expand the 1st partition into the unallocated space...
Winkey plus X to open Disk Manager (Choose from List)
Right click on the second drive and choose 'Delete Volume'
Right click on 1st drive and choose 'Extend Volume'
This will launch the Extend Volume Wizard, click Next and you will se that the full amount of unallocated space will be entered into the Amount of Space. Click next and Finish, to complete choose Yes.