How to keep your Windows PC awake with StellaWake

Want Windows to stay awake while your PC is streaming video, copying files, or processing a demanding task? Follow this guide to configure StellaWake to prevent sleep during sustained activity and let your PC sleep when it is idle.

Prevent Windows sleep while your PC is in use

Review usage and sleep statistics

Find logged wake-up reasons

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StellaWake v1.3.2 | Compatible with Windows 10, 11, 8.1, 8, 7, and XP
Watch the introduction video: how to prevent Windows sleep

How to set up StellaWake

1. Download and run StellaWake using the button above.
2. Choose a Windows sleep timeout that suits your routine. A short timeout, such as five minutes or less, helps your PC sleep soon after you stop using it.
3. Start with the default activity thresholds in the Settings tab. Adjust the network, local disk, or CPU threshold if your normal tasks are not being detected as expected.
4. Open the Performance tab while your PC is streaming, copying files, or processing work. Compare the activity charts with their threshold indicators.
5. Fine-tune a threshold in Settings, then return to Performance to check the result. Sustained activity above a threshold prevents sleep; brief spikes alone do not.

How to prevent sleep while streaming video

To keep a Windows PC awake while streaming a movie or series over your local network, start the stream and check network activity in the Performance tab. StellaWake can prevent sleep while the network traffic stays above its configured threshold. If playback is paused or stopped, sleep prevention continues for a few minutes so a short break does not interrupt your viewing.

How to keep Windows awake during large file transfers

When copying a large photo collection, backup, or other files between disks, open the Local disk chart in the Performance tab and check the transfer activity. If the activity does not reach the threshold, lower the local disk threshold in Settings. Check the chart again during a transfer to confirm that sustained disk activity is detected and sleep prevention starts.

How to prevent sleep during CPU-intensive work

For tasks such as rendering CGI or editing large photo projects, check the CPU chart in the Performance tab while the work is running. CPU usage is shown as a percentage from 0 to 100. If StellaWake does not prevent sleep during sustained processing, adjust the CPU threshold in Settings and review the chart again.

How to tune activity thresholds

Use the Performance tab to observe network, local disk, and CPU activity during the tasks you want to protect. The blue indicator shows the configured threshold. Sustained activity above that level can prevent sleep, while brief spikes do not trigger prevention. If sleep prevention does not start during network activity, lower the network threshold in the Settings tab. If sleep is being prevented too often, raise the threshold. Compare the updated chart with the blue indicator to check that the setting matches your use. Most high-performance PCs work well with the default values, but different hardware and tasks may need different thresholds.

How to monitor PC activity and reduce idle power use

Open the usage chart to compare active, sleeping, and sleep-blocked periods. Use it to understand when your PC is busy and when it is able to sleep. The chart helps you review activity patterns; actual electricity use depends on your PC hardware and workload.

To reduce idle power use, keep the Windows sleep timeout short and configure StellaWake to prevent sleep only during the activity that matters to you. Review the weekly chart after changing your settings to see whether your PC sleeps when it is not in use.

How to find out why your PC woke from sleep

Open the Wake reasons chart to review which device or event woke your PC. Windows device names can be difficult to recognize, so use StellaWake to rename devices in the chart and make later wake-ups easier to identify.

If a network adapter appears as the cause of an unexpected wake-up, check its wake-on-LAN settings. Search for the full device name if you are unsure what it refers to, then review the relevant Windows or device settings.