What a Complete Restart Does
A complete restart closes every program running on your computer, clears temporary files from memory, and boots the system fresh from the power-on sequence. This is different from putting your computer to sleep or letting it hibernate — those modes keep programs loaded and ready. A complete restart stops everything, powers down, and starts over.
Most people need a complete restart when a program freezes, the system slows down dramatically, or after installing software updates. Restarting clears out stuck processes and resets the computer's working memory, which often solves problems that closing individual programs cannot fix.
Key Takeaways
- A complete restart closes all programs, clears memory, and boots your computer fresh from power-on.
- On Windows, use the Start menu and select Restart, or press Ctrl+Alt+Delete and choose Restart from the power menu.
- On Mac, use the Apple menu, select Shut Down, and then turn the computer back on after it powers off completely.
- Save your work before restarting — the system will warn you about unsaved files, but closing programs first prevents data loss.
- A complete restart typically takes two to five minutes from the moment you initiate it until the desktop is fully loaded.
How to Restart on Windows
The simplest way to restart on Windows is through the Start menu. Click the Start button in the lower left corner, then click the power icon (it looks like a circle with a line at the top). A menu will appear with options including Restart. Click Restart and your computer will begin shutting down when ready.
If your mouse or keyboard is not responding, use the keyboard shortcut Ctrl+Alt+Delete. This opens the security screen. In the lower right corner, you will see a power icon. Click it, then select Restart from the menu that appears. Your computer will restart even if programs are frozen.
Windows will give you a chance to save work in open programs before restarting. If you see a dialog asking whether to save a document, click Save to keep your work. If you click Don't Save, that file's changes will be lost.
How to Restart on Mac
On a Mac, click the Apple menu in the top left corner of the screen. Select Shut Down from the dropdown menu. A dialog will appear asking you to confirm — click Shut Down again. Your Mac will close all programs and power off completely.
Once the screen goes black and the computer is fully off, wait about 10 seconds, then press the power button to turn it back on. The Mac will boot fresh. You can also check the box labeled "Reopen windows when logging back in" if you want the same programs to open automatically after restart.
If your Mac is not responding to the mouse or trackpad, hold down the power button for about 10 seconds until the screen goes black. This forces a shutdown. Then press the power button again to restart. This method is more forceful and should only be used when the normal shutdown is not working.
What Happens During a Restart
When you initiate a restart, your operating system begins closing programs in the background. You may see a screen that says "Shutting down" or "Restarting" — this is normal and can take 30 seconds to two minutes depending on how many programs are running. Do not turn off the power or close the laptop lid during this time.
Once the shutdown is complete, the computer powers off. Then it automatically powers back on and runs through the boot sequence — loading the operating system, checking hardware, and preparing the desktop. This entire process usually takes two to five minutes total. The speed depends on your computer's age, how much storage it has, and whether it is running a background update.
When you see the login screen or desktop, the restart is complete. Programs that were open before the restart will not automatically reopen unless you set them to do so (Mac offers this option; Windows does not by default).
Saving Your Work Before Restarting
Before you restart, save any open documents or files. Use Ctrl+S on Windows or Command+S on Mac to save the current document. If you have multiple programs open with unsaved work, go through each one and save before restarting.
When you click Restart, the system will show you a list of programs with unsaved changes and ask whether you want to save them. You can click Save All to save everything at once, or go through each program individually. If you click Restart without saving, those changes will be lost permanently.
Close your email, web browser, and any other programs that might have unsaved work. This prevents the restart from being delayed by save dialogs and ensures you do not lose anything important.
Troubleshooting a Restart That Will Not Complete
If your computer is stuck on the "Shutting down" screen for more than five minutes, a program may be refusing to close. On Windows, press Ctrl+Alt+Delete, select Task Manager, and look for any program that says "Not Responding." Click it and select End Task. Then try restarting again.
On Mac, press Command+Option+Escape to open the Force Quit window. Select any program that says "Not Responding" and click Force Quit. Then try shutting down again through the Apple menu.
If the restart still will not complete, you can force a shutdown by holding the power button for 10 seconds until the screen goes black. This is harder on your computer than a normal restart, but it will work when nothing else does. After a forced shutdown, wait 10 seconds before pressing the power button to turn it back on.
When to Do a Complete Restart Instead of Other Options
A complete restart is different from restarting individual programs or putting your computer to sleep. If only one program is frozen, you can close just that program without restarting the whole system. On Windows, open Task Manager (Ctrl+Shift+Escape) and end the frozen program. On Mac, use Force Quit (Command+Option+Escape).
Sleep mode puts your computer into a low-power state but keeps programs loaded in memory. Waking from sleep is faster than a complete restart, but it does not clear memory or reset stuck processes. Use sleep mode when you are stepping away briefly and want to resume quickly. Use a complete restart when the system is slow, a program is frozen, or after installing updates.
Restart your computer completely once a week or whenever you notice slowness, freezing, or unusual behavior. This keeps the system running smoothly and clears out temporary files that build up over time.
Frequently Asked Questions
Will restarting delete my files or programs?
No. A restart closes programs and clears temporary memory, but it does not delete files, documents, or installed programs. Everything you saved before the restart will still be there after it completes. Only unsaved changes to open documents will be lost.
How long should a restart take?
A complete restart usually takes two to five minutes from the moment you click Restart until the desktop is fully loaded and ready to use. Older computers or those with many programs installed may take longer. If a restart takes more than 10 minutes, something may be wrong — try restarting again.
Can I use my computer while it is restarting?
No. During the shutdown and boot process, your computer is not ready for use. Wait until you see the desktop and all startup programs have finished loading before opening files or programs. Trying to use the computer during restart can cause errors.
What is the difference between restart and shut down?
Shut Down powers off your computer completely and leaves it off. You must manually press the power button to turn it back on. Restart powers off and then automatically powers back on. Use Restart when you want the computer to boot fresh. Use Shut Down when you are done for the day.
Do I need to restart after installing updates?
Usually yes. Most software updates and Windows or Mac system updates require a restart to take effect. The system will prompt you to restart after an update completes. Do not ignore this prompt — restarting ensures the update is fully installed and working correctly.