File extension .LCK
Full Name | Developer | Category |
---|---|---|
Lock Format | N/A | Misc Files |
The LCK file extension is a type of lock file used by various software applications. It is primarily used as a synchronization or coordination mechanism among multiple programs to prevent them from simultaneously accessing the same data. The use of LCK files can be found in all major operating systems, including Windows, Mac OS and Linux. They are managed by the application that produced or created them, so they are not visible to the user in the user interface.
An LCK file indicates that the associated data item is being modified or is locked for exclusive access by another program or process. Generally speaking, when an application attempts to open a file of this type, it will recognize the lock file and be prevented from proceeding until the application or process that created it has released it. Examples of applications that create LCK files include Microsoft Office ( Word, Excel, Access, etc.), Adobe Acrobat, Indexers and Compilers.
Similar File Extensions
Other similar file extensions in use are: LCK0, LCK1, .LACCDB, LCK2, LOCKED. To help distinguish them from one another, some of these lock files may also have associated application codes appended to them such as.WLX, .QWD, or .DWT, depending on the application being used.
Programs for WINDOWS system
Programs for MAC system
Programs for LINUX system
After installing the required software, the operating system will usually automatically associate an unknown file type (in this case .LCK) with the new application. If this does not happen, we can help the system a bit by selecting the software for it, which it should always use to open files with the .LCK extension.
When choosing the software we can select the system to use this software every time.
Remember!
Using it for the first time it is good to check whether the .LCK file opened in the application can be read by us and opens in a way that allows us to use it. If everything is in order, select this option the next time you open a file with the .LCK extension. However, if the file has not opened correctly, we have to look for a different software, with which we can open files with the .LCK extension. Select a different software from our list and install it on your computer. After the software is installed, repeat inspection openings of a .LCK file. Sometimes you have to repeat the operation several times.
Other instructions
If none of the programs listed by us to work with the .LCK file has not meet your expectations, you can try searching other websites. But remember to avoid downloading programs "that can open any file". These applications not only have very limited functionality, but may also expose you to expense tens of dollars when purchasing a license.
In the vast majority of cases you will find the program dedicated to support the .LCK file, or any other file format. In addition, there is a chance that it will be a free program, and its functionality (concerning the .LCK file) will be extended to the maximum.
It is also good to check
- if the .LCK file has no errors
- or if it has been copied (or downloaded by the browser) thoroughly
Author’s guidelines

Mr B. Adam
Author of the guidelines / Founder of FileExtension.info
New technologies enthusiast, helping to solve problems with the files.
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