I am trying to reformat my one 120GB hard drive. When I go to command promp and type /format c: it gives me the warning that data will be lost. after typing Y it says \
format cannot run because the volume is in use by another prosses. Format may run if this volume is dismounted first. ALL OPENED HANDLES TO THIS VOLUME WOULD THEN BE INVALID. Would you like to force a dismount on this voulume?
when I go yes it says
Cannot lock the drive volume is still in use.
How do I "dismound the volume" or otherwise reformat the hd.