The problem with this command, however, is that it appears only in the context menu of file types for which a file viewer is available (as determined by Microsoft). If you want to use Quick View for other file types, try adding its shortcut to the Send To menu.

Open an Explorer window and navigate your way to the Windows\System\Viewers folder. Inside, you'll see Quikview.exe. Create a shortcut to this file in your Windows\SendTo folder. (Inside a second Explorer window, open the Windows folder, right-click and drag Quikview.exe into this window, release the mouse button, and select Create Shortcut(s) Here.) With the Quikview.exe shortcut selected, press F2 (for Rename), name the file Quick View, and press Enter. Close all open windows.

Right-click any file, select Send To, then choose Quick View in the pop-out menu. Click Yes to confirm that you want to try the default viewers, and you'll see a preview of your file (in rough form, of course, but that's all you wanted anyway).