It has many other flavors:
*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.
How to make Unlocker work on Windows Vista? You need to deactivate UAC globally for the whole system or locally just for Unlocker. Globally, go to "Control Panel" then "User Accounts" then again "User Accounts" then "Turn User Account Control" and set it to Off, then restart your computer. Locally go to the Unlocker install directory (usually C:/Program Files/Unlocker), right-click Unlocker.exe, select Properties, and on the "Compatibility" tab, under "Priviledge Level" enable "Run this program as administrator". Click "allow" everytime you will get the UAC prompt to ask if you want to run Unlocker.