What Rebooting Does and When You Need It
A reboot shuts down your computer completely and starts it fresh. When you restart, the operating system reloads, all programs close, and temporary files clear from memory. This fixes most common problems: frozen screens, slow performance, programs that won't respond, and internet connection drops.
Reboot your computer when a program stops working, when your internet cuts out and reconnecting doesn't help, or when your machine feels sluggish after running for several days. You should also reboot after installing software updates, because many updates require a restart to take effect.
A reboot is different from shutting down. Shutdown turns the computer off completely. A reboot shuts it down and when ready turns it back on in one motion. Both clear memory, but a reboot gets you working again faster.
Key Takeaways
- On Windows, click the Start menu, select the power icon, and choose Restart from the menu that appears.
- On Mac, click the Apple menu in the top-left corner, select Restart, and confirm when prompted.
- Save all open work before rebooting, because all programs will close and unsaved changes will be lost.
- A normal reboot takes two to five minutes from start to finish, depending on how many programs your computer loads at startup.
- If your computer is frozen and won't respond to clicks, force it to shut down using the power button, then turn it back on.
How to Reboot Windows 10 and Windows 11
Save any open documents first. Click the Start button in the bottom-left corner of your screen. A menu will open showing your installed programs and settings.
Look for the power icon — it looks like a circle with a line at the top. In Windows 10, it appears in the lower-left corner of the Start menu. In Windows 11, it's in the lower-right corner. Click it once.
A small menu with three options will appear: Sleep, Shut down, and Restart. Click Restart. Your computer will close all programs, shut down, and turn back on automatically. The whole process usually takes two to five minutes. You'll see a login screen when it's ready.
How to Reboot a Mac
Save your work in all open programs. Click the Apple menu in the top-left corner of your screen — it's the black Apple logo. A dropdown menu will appear.
Select Restart from the menu. A dialog box will ask you to confirm. You can check the box labeled "Reopen windows when logging back in" if you want your programs to open automatically after the restart, or leave it unchecked to start fresh. Click the Restart button to proceed.
Your Mac will close all programs and restart. Like Windows, this usually takes two to five minutes. You may be asked to enter your password when the login screen appears.
Force Restarting When Your Computer Won't Respond
If your screen is frozen and clicking or typing does nothing, your computer may not respond to the normal restart command. In this case, you can force it to shut down using the power button.
On Windows, hold down the power button on your computer for ten seconds. The screen will go black and the computer will shut down completely. Wait five seconds, then press the power button once to turn it back on. On a Mac, hold down the power button for ten seconds until the screen goes dark. Wait a few seconds, then press the power button again to restart.
Force restarting should only be used when the computer is completely unresponsive. It's harder on your system than a normal restart because programs don't close cleanly, but it's the only option when nothing else works.
What Happens During a Reboot
When you click Restart, your operating system begins closing all open programs. If a program has unsaved work, you'll see a prompt asking whether to save before closing. After all programs close, the operating system shuts down.
The computer then powers off completely for a moment, then powers back on. As it starts, it runs a quick check of your hardware, loads the operating system into memory, and starts any programs set to launch at startup. This is why the reboot takes a few minutes — the computer is doing a lot of work behind the scenes.
Once you see the login screen, your computer has finished restarting. Enter your password and you're back to your desktop. Any programs you had open are now closed, and your computer's memory is clear.
Common Mistakes to Avoid
The biggest mistake is not saving your work before rebooting. When you restart, all programs close when ready. Any document you were editing without saving will be lost. Always save first, or at least check that you've saved the files you care about.
Don't unplug your computer or hold down the power button unless it's completely frozen. A normal restart is gentler on your hardware. Force shutdowns should be a last resort.
Don't be alarmed if your computer takes longer to restart than usual. If you've just installed updates, the first restart may take five to ten minutes as the system completes the installation. This is normal. If a restart takes more than fifteen minutes, something may be wrong — try force shutting down and restarting again.
When to Reboot vs. Other Fixes
A reboot fixes most temporary problems, but not all computer issues need a restart. If one program is frozen but others work fine, try closing just that program instead. Click the program's window and press Alt+F4 on Windows, or Command+Q on Mac, to close it without restarting everything.
If your internet is slow, try unplugging your router for thirty seconds and plugging it back in before rebooting your computer. If a program keeps crashing, reboot first, but if it crashes again when ready after restart, the problem is likely with that program, not your system.
Rebooting once a week is good practice for computer health, even if nothing is wrong. It clears temporary files and gives your system a fresh start. If you leave your computer running for weeks without restarting, performance usually degrades over time.
Frequently Asked Questions
How long should a reboot take?
A normal reboot takes two to five minutes from the moment you click Restart until you see your desktop. If you've just installed updates, the first restart may take up to ten minutes. If a reboot takes longer than fifteen minutes, force shut down and try again.
Will I lose my work if I reboot?
You will lose any unsaved work in open programs. Before rebooting, save all documents you're working on. Most programs will prompt you to save if you try to close them with unsaved changes.
Can I reboot while programs are running?
Yes, but save your work first. When you restart, all programs close automatically. Any unsaved changes will be lost. It's always safer to save before restarting.
What's the difference between reboot and shutdown?
Shutdown turns your computer off completely and leaves it off. Reboot shuts it down and when ready turns it back on. Both clear your computer's memory, but a reboot gets you working again faster.
Do I need to reboot after installing software?
Many software installations require a reboot to finish. The installer will usually tell you if a restart is needed. If you're unsure, rebooting after installing anything new is safe and often necessary for the software to work properly.