Place it as the final beat of an edit, after the last visual gag has landed. Lead into it with the Classic Error Sound Effect when a fake crash sets up the ending, then let the shutdown close the scene before any outro music returns.
About this sound
This is the short shutdown chime from Windows 98, a soft synth jingle about three and a half seconds long that played as the system powered down. It feels calm and gently wistful, like the end of an evening at a beige desktop, and it sparks instant recognition for anyone who used home computers in the late 1990s. The sound comes from Microsoft's Windows 98 operating system, released in 1998.