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 hold the power button for ten seconds, wait five seconds, then press it again. On Mac, click the Apple menu, select Shut Down, check "Reopen windows when logging back in" if you want your programs to return, then restart when prompted. On Linux, open a terminal and type sudo reboot, then press Enter.
A reboot is different from shutting down — shutdown closes everything and powers off completely, while a reboot powers off and when ready turns back on. A reboot is also different from sleep mode, which keeps your computer powered but uses less energy. Use a reboot when your computer is running slowly, a program has frozen, or you have installed updates that require a restart.
Key Takeaways
- Windows users can reboot by holding the power button for ten seconds, waiting five seconds, then pressing it again, or by opening the Start menu and selecting Restart.
- Mac users should click the Apple menu, select Shut Down, and then restart the computer when the shutdown is complete.
- Linux users can open a terminal and type sudo reboot followed by Enter to restart when ready.
- A reboot closes all programs and clears memory, which often fixes freezing, slow performance, or program crashes.
- Save your work before rebooting, because all unsaved files will be lost when the computer powers down.
Rebooting a Windows computer using the Start menu
Click the Start button in the bottom left corner of your screen. Type "restart" into the search box that appears. Select "Restart your PC" from the results. Windows will show a countdown — usually 15 seconds — before the reboot begins. If you need more time to save work, click "Restart later" to delay the restart by one hour.
If you want to restart when ready without the countdown, open the Start menu, click the power icon in the bottom left, and select "Restart" directly. This method skips the countdown entirely. Windows will close all open programs and begin the reboot process.
Rebooting a Windows computer using the power button
Press and hold the power button on your computer for ten seconds without releasing. The screen will go black and the computer will shut down. Wait five seconds, then press the power button once to turn it back on. The computer will boot up normally.
This method works when your computer is frozen and the Start menu does not respond. It is a hard shutdown, meaning Windows does not have time to close programs gracefully, so you may lose unsaved work. Use this method only when the Start menu method does not work.
Rebooting a Mac computer
Click the Apple menu in the top left corner of your screen. Select "Shut Down" from the dropdown menu. A dialog box will appear asking if you want to reopen windows when you log back in — check this box if you want your open programs and documents to return after the restart. Click "Shut Down" to confirm. The Mac will power off completely.
Wait ten seconds, then press the power button once to turn the Mac back on. The startup process takes 30 to 60 seconds depending on your Mac model. If you checked "Reopen windows when logging back in," your programs and documents will return to their previous state.
If your Mac is frozen and the Apple menu does not respond, hold down the power button for ten seconds until the screen goes black. Wait five seconds, then press the power button again to restart.
Rebooting a Linux computer from the terminal
Open a terminal window — on most Linux distributions, you can right-click the desktop and select "Open Terminal" or press Ctrl+Alt+T. Type sudo reboot and press Enter. The system will ask for your password. Type it and press Enter again. The computer will shut down and restart automatically.
If you want to delay the reboot, type sudo shutdown -r +5 to restart in five minutes, or replace 5 with any number of minutes you prefer. To cancel a scheduled reboot, type sudo shutdown -c and press Enter.
If the terminal method does not work, use the graphical method: click the system menu in the top right corner, select the power icon, and choose "Restart" or "Shut Down" from the options.
What to do before you reboot
Save all open documents and files before starting a reboot. Close any programs you are running, or at least save your work within them. A reboot closes everything without warning, and any unsaved changes will be lost.
If you are downloading a file or running a backup, wait for it to finish before rebooting. Interrupting a read or backup can corrupt files or leave your system in an unstable state. If you are installing software, complete the installation before rebooting unless the installer specifically asks you to restart.
Tell other people who share your computer that you are about to reboot, especially if they are using it remotely or have files open on a shared drive. A reboot will disconnect them from the network and interrupt their work.
When your computer will not reboot normally
If the Start menu or Apple menu does not respond, use the power button method: hold it for ten seconds until the screen goes black, wait five seconds, then press it once to restart. This forces a shutdown and is safe to use.
If the computer restarts but gets stuck on the startup screen, try restarting again using the power button method. If it continues to get stuck, the operating system may be damaged. On Windows, you can try starting in Safe Mode by holding F8 or Shift+F8 during startup, which loads only essential drivers and programs. On Mac, hold Command+S during startup to enter Single-User Mode, which gives you access to repair tools.
If your computer will not start at all after a reboot attempt, check that the power cable is firmly connected to both the computer and the wall outlet. If the cable is connected and the computer still will not start, the power supply may have failed and you may need to contact a repair technician.
Frequently Asked Questions
How long does a reboot take?
Most computers reboot in two to five minutes. Older computers or those with many programs installed may take longer. The startup process includes loading the operating system, checking hardware, and starting background services. If your reboot takes longer than ten minutes, the computer may be stuck and you can try the power button method again.
Will I lose my files if I reboot?
Files saved to your hard drive will not be lost. Only unsaved work in open programs will be lost. Before rebooting, save all documents and close programs to avoid losing changes. If you have a document open that you have not saved, most programs will ask you to save it before closing.
Is it safe to reboot my computer regularly?
Yes, rebooting regularly is safe and often recommended. Many updates and maintenance tasks require a reboot to take effect. Rebooting once a week or once a month helps clear memory and can improve performance. Avoid rebooting during important tasks like backups or file transfers.
What is the difference between reboot and restart?
Reboot and restart mean the same thing — both shut down the computer and turn it back on. The terms are used interchangeably. Some people use "restart" to refer to a graceful shutdown through the operating system, and "reboot" to refer to a hard shutdown using the power button, but both accomplish the same result.
Can I reboot my computer remotely?
Yes, if you have remote access software installed like TeamViewer, AnyDesk, or Windows Remote Desktop, you can reboot a computer from another device. Open the remote access program, connect to the target computer, and use the same reboot methods described above. Some servers and network computers can also be rebooted using command-line tools if you have administrator access.