Place this clip right after the denied attempt in your edit, preceded by the Windows XP Startup Sound for a fake boot-up, then follow it with a Fail Sound Meme to close the sequence for the viewer.
About this sound
This 1.3-second clip is the computerised voice that blocks Dennis Nedry, repeating a singsong ah ah ah before the line about not saying the magic word. It feels smug, playful and mildly scolding, turning a blunt refusal into a joke. It comes from the 1993 film Jurassic Park, during Nedry's attempt to bypass park security.