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If you tried to remove a file or a folder and you got the "Access is denied" window, try this useful tutorial.

Let's see some reasons cause the file to be locked and be denied to edit or delete.

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.

This is useful when you must replace any file in windows (crack.exe; .dll;) and you have to restart in safe mode.

How to
You only need this tool, named unlocker.

Install unlocker. After install, simply right click the folder or file and select Unlocker.

If the folder or file is locked, a window listing of lockers will appear
Now the only thing you can do is to click Unlock All and you are done!