A file extension or file name extension is the ending of a file that helps identify the type of file in operating systems, such as Microsoft Windows. In Microsoft Windows, the file name extension is a period that is often followed by three characters but may also be one, two, or four characters long.
After installation of the machine one needs to manually rename the computer. This can be done through the start then settings, then system, and select rename the PC in the right-hand side column.
