A long export or demonstration may outlast the normal idle timeout while you remain at the computer. PowerToys Awake can request a temporary awake period without rewriting the Windows power plan. Choose a bounded interval so the exception has a clear end.

Before starting, check that the task has adequate power and ventilation. Save its input files and identify how the application reports completion. Keeping Windows awake cannot correct an application error or turn an unfinished export into a valid result.

Set a temporary period deliberately

In PowerToys Settings, enable Awake and choose the time-interval or expiration option appropriate to the task. Set a reasonable end point and note it. Microsoft states that editing the interval's hours or minutes resets its timer, so avoid adjusting the fields merely to inspect them.

Decide separately whether the display must remain on. Awake's screen option controls that part of the experience; a computer can continue working while its display is off. For a visible demonstration, test the screen behaviour before the audience arrives.

Understand the session boundary

Microsoft documents that Awake does not operate while the lock screen is displayed. Do not leave a shared computer unlocked just to preserve an Awake request. If an authorised unattended task must continue while locked, arrange suitable Windows power settings with the responsible administrator and test that workflow separately.

Likewise, manually choosing sleep or hibernation is not prevented by the utility. Keep the computer in the intended working state and monitor the application's own progress. If the job stalls, investigate the job instead of repeatedly extending the awake period.

When the output is complete, open or inspect a representative result. Then return Awake to the normal-plan mode or disable it, and confirm the temporary request has ended. Record a successful application result separately from the observation that the computer stayed awake; those are different acceptance checks.

Source: Microsoft PowerToys documentation.