The operation of opening a file with an unknown extension can be reduced to two main algorithms of actions: determining the extension and assigning a specific program to open all files of this type. Most files with a missing extension are text files, so Notepad is the recommended program to open them.
Instructions
Step 1
Call the context menu of the selected file by right-clicking and go to the "Properties" item to define the extension.
Step 2
Search the Internet for the specified extension and determine the program designed to open it.
Step 3
Click the "Start" button to bring up the main menu of the system and go to the "Run" item to launch the command line utility to assign a viewer for files of unknown type.
Step 4
Enter regedit in the Open box and click OK to launch the Registry Editor tool.
Step 5
Expand the HKEY_CLASSES_ROOTUnknownshell registry key and create an Open subkey in it.
Step 6
Specify the default value for the newly created Read in Notepad option and create a new command section in it.
Step 7
Specify the value of the created default parameter C: Windowssystem32
otepad.exe% 1. This action will cause the "Read in Notepad" item to appear in the context menu of the required file.
Step 8
Go back to the HKEY_CLASSES_ROOTUnknownshell section and set the default to Open instead of OpenAs to automatically open the selected file in Notepad.
Step 9
Start Notepad and copy the following value into it: REGEDIT4
[HKEY_CLASSES_ROOTUnknownshell]
@ = "open"
[HKEY_CLASSES_ROOTUnknownshellopen]
@ = "Open in notepad"
[HKEY_CLASSES_ROOTUnknownshellopencommand]
@ = "C: / Program Files / notepad / notepad.exe% 1" This is necessary to simplify the process of creating a file viewer with an unknown extension.
Step 10
Save the created file with the.reg extension on your desktop and run it with a double click of the mouse. This action will launch the Notepad application when you double-click on the icon of the selected file with an unknown extension.
Step 11
Call the context menu of the required file by clicking the right mouse button and select "Open with" if you need to use another program.
