How to Open Windows Shell Common DLL

1. Log in to Windows as an administrator if your normal user profile does not have those privileges.
2. Click on the Start icon in the lower left corner of the desktop and type "shell32.dll" into the search box. Press "Enter."
3. Click on the "Open with" button in the Caution box that pops up. In the next dialog box, choose "Select a program from a list of installed programs."
4. Click on "Notepad" in the Open With window. Click to uncheck the box next to "Always use the selected program to open this kind of file. Click "OK" to open the file.