There are a few differences in Windows and Linux on how they use the names of their system variables. For example, a user in Windows can’t directly create a file or folder named “CON” because it is a system variable used by the system.
Although you can’t create the file, you can move a file named “CON” from the Internet or other media to Windows hard drive. You can also rename a file or folder to CON using ASCII characters. To rename a file/folder to CON, just follow the instructions below:
Right click the file and select rename
Now press Alt + 2 + 5 + 5 from the number pad of your computer