StellaWake features: Sleep blocking

Prevent Windows sleep automatically

Sleep blocking feature

Feature explanations
Sleep blocking
Computer usage statistics
Wake up reasons
Debug log
StellaWake will prevent Windows sleep when you want to keep your computer awake. But first let's talk about sleep mode and how it works. Windows offers a very useful feature: sleep mode. It's also called standby. You can set up sleep mode in Control panel / System and Security / Power Options. You can also simply type sleep into the Windows search bar to quickly launch the relevant setting dialog.

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What is the difference betwen sleep and hibernate?

Not much. Hibernate saves data to harddisk, while sleep mode just keeps your data alive in the ram (digital memory). Most PCs don't even offer hibernate mode anymore. Sleep mode is the way to go, it barely consumes any power and it takes a few seconds to shift in and out of sleep. Hibernate works well on some older systems that can't handle sleep mode properly. New Windows releases together with modern motherboards can perform sleep mode with a negligible power consumption rate.

Sleep is amazingly efficient: most PCs will consume 1-2 watts only when in sleep mode. And they consume the same amount when turned off. The PC will use a little bit of power even when turned off completely. A small part of hardware stays awake to monitor network cables for signals and so on.

How does StellaWake block sleep?

Windows will shift your PC to sleep when:

However if you are using software that will not block sleep mode, then you either extend the Windows sleep timer or you're gonna encounter unpleasant standbys interrupting your computer usage.

StellaWake settings that control when to block Windows sleepStellaWake is simple: it will monitor CPU, local disk and network usage. If usage stays above the threshold for a considerable period, it will block sleep mode as long as the resource usage stays above the threshold. You can always find StellaWake in your Windows's tray area. Left click the icon to open the application's main window. Choose the Settings tab to find these options.

Set up thresholds for 3 resources

You have 3 main options you can disable/enable and finetune individually.

StellaWake shows recent resource usage chartsChanging over to the Performance tab you can see the recent resource usage per class. CPU, network, filesystem will be displayed separately. The bottom of the charts will be shown in blue: these are the performance levels under the threshold you set up in the Setup tab (see above). Spikes over the threshold will show up as grey. This is what controls StellaWake's sleep blocking. If much of the recent resource usage spikes over the threshold, then sleep is going to be blocked. The combination of all 3 resources are being checked constantly: a big, continous spike in one resource usage is worth the same as a bunch of small individual spikes over 3 different resources.

Sleep Status chart and statuses explained

Recent sleep status chartPaging to the Sleep Status tab you can see the recent status history. Pick a time range to explore, see sleep summary numbers under the chart. The status bar's color codes probably need a bit of explanation.

Good to know

StellaWake will check your Windows sleep setting timer every minute and adjust accordingly. There is no way to tell which software is preventing Windows sleep.