The fastest way to reboot depends on your operating system

A reboot clears your computer's memory, closes all running programs, and restarts the operating system from scratch. Most reboots take two to five minutes. On Windows, the quickest method is to press the Windows key, type "restart", and select "Restart your PC". On Mac, click the Apple menu in the top left, select "Restart", and confirm. On Linux, open a terminal and type sudo reboot, then enter your password.

Rebooting fixes many common problems: frozen screens, slow performance, programs that won't close, and internet connection drops. It also installs updates that Windows and Mac read in the background. If your computer is running slowly or behaving oddly, a reboot is usually the first thing to try before troubleshooting anything else.

Key Takeaways

  • Windows users can reboot fastest by pressing the Windows key, typing "restart", and selecting the restart option from the menu.
  • Mac users should click the Apple menu, select "Restart", and confirm the action in the dialog box that appears.
  • A standard reboot takes two to five minutes and closes all open programs, so save your work first.
  • Force restarting a frozen computer (holding the power button for ten seconds) should only be used when the normal reboot method does not respond.

Rebooting a Windows computer

The standard method works on Windows 10 and Windows 11. Press the Windows key (the key with four squares), type "restart", and you will see "Restart your PC" appear at the top of the search results. Click it. A window will open asking you to save your work and close programs. Click "Restart" to confirm. Your computer will shut down and start up again.

If you prefer the Settings menu, click the Start button, select "Settings", then "System", then "About", and finally "Restart now" in the bottom right. This route takes slightly longer but shows the same restart window.

If your computer is completely frozen and will not respond to keyboard or mouse input, hold down the power button for ten seconds until the screen goes black. Wait thirty seconds, then press the power button once to turn it back on. This is a force restart and should only be used when the normal method fails, because it can damage files that were open when you forced the shutdown.

Rebooting a Mac computer

Click the Apple menu in the top left corner of the screen. A dropdown menu will appear. Select "Restart" from the list. A dialog box will ask whether you want to reopen windows when the computer restarts — you can leave this checked or uncheck it depending on whether you want those programs to open again. Click "Restart" to confirm.

If you have unsaved work, macOS will warn you before closing each program. Save your documents first to avoid losing changes. The reboot will proceed once all programs are closed.

If your Mac is frozen, hold down the power button (usually in the top right corner of the keyboard, or on the side of the machine) for about ten seconds until the screen goes black. Wait a few seconds, then press the power button again to turn it back on. Like Windows, this force restart should be a last resort.

Rebooting a Linux computer

Open a terminal window. On most Linux systems, you can right-click the desktop and select "Open Terminal", or press Ctrl+Alt+T. Type sudo reboot and press Enter. You will be asked to enter your password (the one you use to log in). Type it and press Enter again. The computer will shut down and restart.

If you want to reboot after a delay — for example, to give yourself time to save work — type sudo shutdown -r +5 to reboot in five minutes. Replace the 5 with any number of minutes you need. To cancel a scheduled reboot before it happens, type sudo shutdown -c.

If the terminal method does not work, try the graphical menu. Click the system menu (usually in the top right corner), look for "Power" or "Shut Down", and select "Restart". The exact location varies by Linux distribution.

What happens during a reboot

When you reboot, your computer shuts down all running programs and clears the RAM (the temporary memory that programs use while they are open). The operating system then loads fresh from the hard drive or solid-state drive. This process takes longer the first time you reboot after a major update, because the system may need to finish installing files.

During a reboot, any work you have not saved will be lost. Most programs will warn you about unsaved files before closing, but some will not. Always save your work before rebooting, especially if you have been working in a program for a long time without saving.

Your computer may restart automatically after installing Windows or Mac updates. If you see a notification saying "Updates are ready to install" or "Your computer will restart in 15 minutes", you can usually delay the restart by clicking "Remind me later". Choose a time when you have saved all your work and closed programs you are using.

When to reboot instead of just shutting down

A reboot is different from a shutdown. Shutdown turns the computer off completely. A reboot shuts it down and when ready turns it back on. Rebooting is better for fixing temporary problems because it clears memory and reloads the operating system fresh. Shutting down is better if you are not going to use the computer for a while and want to save electricity.

Reboot when a program is frozen, your internet connection has dropped, your computer is running slowly, or you have just installed software and the installer asked you to reboot. Shutdown when you are done for the day or need to move the computer.

Troubleshooting a reboot that will not complete

If your computer starts to reboot but gets stuck on a loading screen or a black screen, wait at least five minutes before doing anything. Some reboots, especially after major updates, take longer than usual. If nothing has changed after five minutes, hold the power button for ten seconds to force the computer off, then turn it back on.

If the computer reboots repeatedly without fully starting up, it may have a corrupted file or a hardware problem. Try rebooting in Safe Mode (on Windows, restart and press F8 or Shift+F8 during startup; on Mac, restart and hold Shift). Safe Mode loads only essential programs and can help you identify whether a third-party program is causing the problem.

If rebooting does not fix the problem and the computer continues to freeze or restart on its own, the issue may be a failing hard drive, overheating, or a software conflict that requires more advanced troubleshooting or professional repair.

Frequently Asked Questions

Will rebooting delete my files?

No. A reboot only restarts the operating system and clears temporary memory. All files saved on your hard drive or solid-state drive remain untouched. Only work you have not saved to disk will be lost.

How often should I reboot my computer?

Most computers work fine for weeks or months without rebooting. Reboot when you notice problems like slowness, freezing, or connection drops, or when the operating system prompts you to install updates. Some users reboot weekly as routine maintenance, but it is not required.

What is the difference between reboot and restart?

The terms are used interchangeably. Both mean shutting down the operating system and starting it up again. There is no technical difference between them.

Can I reboot while programs are running?

Yes, but you will lose any unsaved work in those programs. Most operating systems will warn you about unsaved files and give you a chance to save before closing. Save your work first, then reboot.

Why is my computer still slow after rebooting?

A reboot fixes temporary problems but not permanent ones. If your computer is still slow after rebooting, the issue may be a full hard drive, too many programs starting at boot, malware, or aging hardware. Check how much free space you have on your drive, disable programs you do not use from the startup menu, and run a malware scan.