Techie

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Unlocker is a very useful freeware if you are getting any of these messages when trying to delete a file:
* Cannot delete file: Access is denied
* There has been a sharing violation
* The source or destination file may be in use
* The file is in use by another program or user
* Make sure the disk is not full or write-protected and that the file is not currently in use
Unlocker will make things right again for you.
Run Unlocker and right click the file you want to delete ,select unlocker and then select "delete" action to delete that file

Go to cmd promt.
Enter Drive name that u want to format like if it is H or E whatever.
Type format /x "Drive letter".
Supose u want to format H drive. then type format /x H:
This will solve ur problem for sure.

else

use this software to format