When trying out the Beta AIK for Windows 7 I got into a situation where some files got locked by the system, probably due to a not properly unmounted WIM file. A tool that has become most handy to unlock files is UNLOCKER. Unlocker integrates itself into the context menu, so that you can easily select a folder or file that you want to unlock.
Unlocker can be downloaded directly from the developers website.
Related posts:
