Information, tips and instructions

File Extension UNKNOWN

Unknown File Extension is given to files whose applications are not installed on a system. This is often referred to as a problem that can only be address by fixing software settings or installing the appropriate software. Errors can occur on several operating systems including Mac, Windows, and Linux.

In Windows, once a user opens a file with an unknown file extension, Windows will automatically prompt the user to select an application to open the file or allow Windows to help locate for appropriate programs over the Internet.

Cleaning the Windows Registry can possibly resolve the unknown file extension error. This will allow the cleaner to fix possible issues with the registry such as miss associated files type and corrupt registry setting. It is also recommended to install the necessary application needed for the extension to be executed.

There have been several instances where virus and other maliciously coded programs delete important registry settings that are associated to an application. This becomes one of the major reasons why a user may suddenly encounter unknown file extension error.

Some unknown file extensions can be opened through applications such as Notepad, but not all is guaranteed to produce relevant content. Files may show text incomprehensible to human readers.

Similar file extensions

• File Extension TMP - Temporary File
• File Extension BAK - Backup File