i would like to reformat the hard drive on my dell latitude laptop. after typing in "format c:" i get the following message: "the type of the file system is ntfs" it then asks to proceed with format. when i respond yes, it says "format cannot be run because the volume is in use by another process. 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 volume? y/n." when i respond yes, it says " cannot lock the drive. the volume is still in use." how do i get around this? thanks.