The fastest way to restart your computer

The quickest restart on Windows is to hold down the Alt key, press F4, and then press Enter when the shutdown dialog appears. This closes all open windows and restarts the machine in about 30 seconds. On a Mac, click the Apple menu in the top-left corner, select Restart, and click Restart again to confirm.

If you need to save work before restarting, close your programs first — this method will not save unsaved documents. Most computers restart within one to two minutes from the moment you press the final key or button.

Key Takeaways

  • Windows users can restart when ready by pressing Alt+F4, then Enter, without opening any menus.
  • Mac users should click the Apple menu and select Restart, then confirm the restart prompt.
  • The Start Menu method on Windows takes slightly longer but is easier to remember if you are not comfortable with keyboard shortcuts.
  • Always save your work before restarting, because unsaved files will be lost when the computer shuts down.
  • A restart clears your computer's temporary memory and often fixes freezing, slow performance, or connection problems.

Using the Windows Start Menu to restart

Click the Start button in the bottom-left corner of your screen. A menu will open. At the bottom of that menu, you will see a power icon (a circle with a line at the top). Click it.

A small submenu appears with three options: Sleep, Shut down, and Restart. Click Restart. Your computer will close all open programs and restart within one to two minutes. You do not need to do anything else — the restart happens automatically.

If you have unsaved work in any program, Windows will ask you to save it before restarting. Take the time to save, because closing the program without saving will delete any changes you made since you last saved.

Restarting a Mac from the Apple menu

Look at the very top-left corner of your screen and click the Apple logo. A dropdown menu appears. Near the middle of that menu, you will see the word Restart. Click it.

A dialog box will pop up asking you to confirm. It says "Are you sure you want to restart your computer now?" Click the Restart button to proceed. Your Mac will close open programs and restart within one to two minutes.

If you have unsaved documents, macOS will ask whether you want to save them before restarting. You can choose to save or discard the changes. If you click Cancel instead of Restart, the restart stops and your computer stays on.

What to do if your computer is frozen and will not restart normally

If your computer is not responding to keyboard or mouse clicks, you will need to force a restart. On Windows, hold down the power button on the front or side of your computer for 10 seconds without letting go. The screen will go black and the computer will shut down completely. Wait 30 seconds, then press the power button once to turn it back on.

On a Mac, hold down the power button (usually in the top-right corner of the keyboard, or on the side of the machine) for 10 seconds. The screen will go dark. Wait 30 seconds, then press the power button again to restart.

A forced restart will close all open programs without saving your work, so you will lose any unsaved changes. Use this method only when your computer is completely frozen and will not respond to normal restart commands.

Why you might need to restart your computer

Restarting clears your computer's temporary memory and closes programs that may be running slowly in the background. If your computer feels sluggish, freezes often, or loses internet connection, a restart usually fixes the problem within minutes.

Many software updates also require a restart to take effect. When you install updates to Windows, macOS, or individual programs, the system will prompt you to restart. Restarting completes the installation and ensures the new version runs correctly.

If you are troubleshooting a problem — whether it is a program that will not open, a printer that will not print, or a network connection that dropped — restarting is almost always the first step to try. It costs nothing and solves most temporary glitches.

How long a restart takes and what to expect

A normal restart takes one to three minutes from the moment you click Restart until your desktop appears again. The exact time depends on how many programs you have installed and how much data your computer needs to load.

During a restart, your screen will go black or show a loading screen. Do not turn off the power or unplug the computer during this time — let the restart finish on its own. If the restart takes longer than five minutes, your computer may be stuck, and you can try a forced restart.

Once your desktop reappears, wait another 30 seconds before opening programs. Your computer is still loading background services in the background, and opening programs too quickly can slow down the restart process.

Frequently Asked Questions

Will restarting delete my files?

No. Restarting shuts down your computer and turns it back on, but it does not delete any files stored on your hard drive. All your documents, photos, and programs will still be there after the restart. However, any unsaved work in open programs will be lost.

What is the difference between restart and shut down?

Shut down turns off your computer completely. Restart turns it off and then turns it back on automatically. Restart is better for fixing performance problems because it clears temporary memory. Shut down is better if you are not going to use the computer for a while and want to save power.

Can I restart my computer while it is installing updates?

No. If Windows or macOS is installing updates, let it finish before restarting. Interrupting an update installation can damage your system. If an update is stuck and will not finish, wait at least 30 minutes before forcing a restart.

Why does my computer ask to save files when I restart?

Your computer is warning you that you have unsaved changes in open programs. If you click Restart without saving, those changes will be lost forever. Click Save to keep your work, or click Discard if you do not need the changes.

Is it bad to restart my computer often?

No. Restarting your computer regularly is actually good for performance. Many people restart once a week or whenever they notice slowness. Frequent restarts do not damage your computer or shorten its lifespan.