File Type Generic IconProgram Lock File
File Format Standard
Usage Referenced by an application; not meant to be opened manually
Rank ★ ★ ☆  Average

Access control file used to "lock" a database or other file from being opened or changed by more than one user at a time; typically is open with the file is not in use and is locked when a user is working on the file; prevents accidentally overwriting changes and possible data corruption.

Some programs that use LCK files include Microsoft FrontPage, Corel Paradox, Autodesk Inventor, Pegasus Mail, and ACT! contact management software.

Since lock files are managed by their corresponding applications, they should not be opened manually.

Open With

IconReferenced by various applications

Updated 2007