You're here because you have a file that has a file extension ending in .mou. Files with the file extension .mou can only be launched by certain applications. It's possible that .mou files are data files rather than documents or media, which means they're not meant to be viewed at all.

A WinMount compressed file may contain one or more files that have been integrated with compression specifications used by the WinMount application. The size of these compressed files stored in a WinMount compressed file archive is smaller than the size of those files when uncompressed. The WinMount software can be used to decompress these WinMount compressed files, and this needs to be done to extract the files and folders stored in a WinMount compressed file. Encoding standards proprietary to WinMount International and to the WinMount software (much like how the compression specifications implemented by the WinMount software are also proprietary to WinMount International and this program) are used to save WinMount compressed files in the MOU file format. These WinMount compressed files are affixed with the .mou extension and may be exported to many compressed file formats using the set of cuntionalities integrated into the WinMount application. Computers running on Microsoft Windows-based systems are implemented with support for installinga nd using the WinMount program, its associated features and the compression and encoding specifications it implements into its output files.

Launch a .mou file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .mou file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .mou files aren't yet associated with it. In this case, when you try to open a .mou file, you can tell Windows which application is the correct one for that file. From then on, opening a  .mou file will open the correct application. Click here to fix .mou file association errors

Be careful not to rename the extension on .mou files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

A file extension is the set of three or four characters at the end of a filename; in this case, .mou. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.