This article was previously published under Q145810
IMPORTANT: This article contains information about modifying the registry. Before you
modify the registry, make sure to back it up and make sure that you understand how to restore
the registry if a problem occurs. For information about how to back up, restore, and edit the
registry, click the following article number to view the article in the Microsoft Knowledge Base:
The Install command may not be available if the default association for
.inf files is changed from the default value. This is often done by using
the right mouse button to click an .inf file while holding down the SHIFT
key, selecting a different program to open the .inf file, and then
selecting the "Always use this program to open this type of file" check
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may
require you to reinstall your operating system. Microsoft cannot guarantee that you can solve
problems that result from using Registry Editor incorrectly. Use Registry Editor at your own
To enable the Install command for .inf files, use any one of the following methods:
NOTE: For information about how to edit the registry, view the Changing
Keys And Values online Help topic in Registry Editor (Regedit.exe).
Note that you should make a backup copy of the registry files
(System.dat and User.dat) before you edit the registry.
WARNING: Using Registry Editor incorrectly can cause serious problems
that may require you to reinstall Windows. Microsoft cannot
guarantee that problems resulting from the incorrect use of Registry
Editor can be solved. Use Registry Editor at your own risk.
Change the "(Default)" value in the HKEY_CLASSES_ROOT\.inf registry key
to inffile. Restart your computer for
this change to take effect.
Restore the standard shell commands. To do so, click the Start button,
click Run, type the following line in the Open box, and then click OK: