Your computer going to sleep at the wrong moment is one of those small problems that gets annoying fast. A long download stalls. A demo screen dims mid-sentence. A call drops you to a lock screen. The usual fix is to dig through every power setting and change a dozen things — and then forget to change them back.
You don't have to do that. Here's how to keep things awake in a controlled way, and how to undo it just as easily.
Why Your Computer Sleeps in the First Place
Sleep and screen-lock exist for good reasons: they save power and keep your machine secure when you step away. The problem is that your computer can't tell the difference between "I've walked off" and "I'm reading a long document and haven't touched the mouse in ten minutes." After a set idle period, it dims, locks, or sleeps regardless.
So the goal isn't to disable sleep forever. It's to keep your computer awake during a specific session, then let normal behaviour return afterwards.
Option 1 — The Built-In Settings (When You Remember to Undo Them)
Both platforms let you change this directly:
Mac: System Settings → Lock Screen and Battery / Power Adapter. You can set the display to turn off later and prevent automatic sleeping while plugged in.
Windows: Settings → System → Power & battery → Screen and sleep. Set the screen and sleep timers to longer values, or to Never while plugged in.
This works, but it has a catch: it's a global change. Set everything to "Never" and your laptop will happily stay awake all night on battery. The settings route is best when you genuinely want a longer default — not for a one-off session you'll forget to reverse.
Option 2 — A Lightweight Keep-Awake Utility
If you just need to stop sleep mode for a while without touching system settings, a small keep-awake utility is the cleaner choice. These sit in your menu bar or system tray and keep the machine awake for a set duration, then get out of the way.
Popular options include Amphetamine or Caffeine on Mac, and PowerToys Awake on Windows. Toggle them on before a long task, toggle them off when you're done. Nothing permanent changes.
For a lot of people, that's the whole answer. If all you need is "don't sleep for the next two hours," stop here.
Option 3 — When You Need Clicks, Not Just Wakefulness
Keep-awake utilities solve sleep. They don't do anything inside a specific app or window. If your task needs actual clicks in a chosen spot — keeping a session active, running a repetitive workflow, holding a kiosk or demo screen in place — a controlled auto clicker is the better fit.
Instead of changing power state, it clicks inside a safe area you choose, on a randomised schedule. That keeps the machine awake as a side effect, and gives you control over where and how often it clicks. Green Dotter is built for exactly this: you pick the area, set a timing range, and it pauses automatically the moment you take over.
Keep It Controlled
Whichever route you pick, the principle is the same: keep your computer awake only for the session you need, and make sure you can stop it instantly. A keep-awake utility you can toggle off, or an auto clicker that pauses when you return, both stay under your control. Avoid the "set everything to Never and forget" trap.
And if this is a work device, check your employer's policies first and make sure your use is allowed before running any keep-awake or automation tool.
Frequently Asked Questions
What is the best way to keep my computer awake?
If you only need to stop sleep mode, a keep-awake utility or power setting may be enough. If you need controlled clicks inside a specific screen area, an auto clicker like Green Dotter is more suitable.
Is an auto clicker the same as a mouse jiggler?
No. A mouse jiggler usually moves the cursor. An auto clicker creates click events inside an area you choose.
Can Green Dotter keep my computer awake?
Yes. Green Dotter can help keep your computer awake during controlled sessions by clicking inside a safe area on your screen.
Should I use this on a work device?
Check your employer's policies first. Green Dotter is a user-controlled automation tool, but you should make sure your use is allowed.
Related: more ways to keep your computer awake on Mac and Windows.