Windows and Mac both have built-in tools to roll back your system

Both Windows and macOS let you restore your computer to a point before something broke or slowed down. Windows calls this System Restore; macOS calls it Time Machine. Both work by saving snapshots of your system files at regular intervals, then letting you revert to one of those snapshots. The process takes 30 minutes to several hours depending on how far back you go and how much data you have.

The catch is that these tools only work if you turned them on before the problem happened. If you never set up System Restore or Time Machine, you cannot use them now. If you did set them up, the older snapshots may have been automatically deleted to make room for new ones — most systems keep only the last few weeks or months of restore points.

Restoring your system will undo software installations, updates, and settings changes made after the restore date. Your personal files (documents, photos, downloads) are usually left alone, but you should back those up separately before you start, just in case.

Key Takeaways

  • Windows System Restore and macOS Time Machine both let you roll back to an earlier date, but only if you enabled them before the problem occurred.
  • System Restore snapshots are usually kept for only a few weeks, so very old restore points may no longer exist on your computer.
  • Restoring your system will undo software changes and updates but typically leaves your personal files untouched.
  • If restore tools are not available, you may need to reinstall Windows or macOS from scratch, which erases everything on the drive.

How to use System Restore on Windows

Open the Start menu, type "System Restore" into the search box, and click "Create a restore point" from the results. A window will open showing your system drives. Click the "System Restore" button at the bottom. Windows will show you a list of available restore points, each with a date and time. Pick the date closest to when your computer was working correctly, then click "Next" and "Finish".

Windows will restart your computer and begin restoring files. Do not turn off your computer during this process — it can take one to three hours depending on how much data you have. When it finishes, your computer will restart again and you will be back at the login screen. Log in and check whether the problem is gone.

If System Restore does not appear in your search results, it may be disabled on your computer. You can turn it on by opening Settings, clicking "System," then "About," then scrolling down and clicking "System protection." Click "Configure," select "Turn on system protection," and click "OK." After that, Windows will begin creating restore points automatically.

How to use Time Machine on macOS

Time Machine requires an external hard drive or network storage connected to your Mac. If you have never set one up, you cannot restore using Time Machine. If you have one connected, click the Time Machine icon in the menu bar (top right of your screen) and select "Enter Time Machine." Your screen will show a timeline on the right side with dates going backward. Click the date you want to restore to, then click "Restore."

Your Mac will restart and begin copying files from that date back to your drive. This can take one to four hours. When it finishes, your Mac will restart and you will be at the login screen. Log in and check whether the problem is fixed.

If you do not see a Time Machine icon in your menu bar, Time Machine is not set up. To turn it on, click the Apple menu, go to "System Settings," click "General," then "Time Machine," and click "Add Backup Disk." Select your external drive and click "Use Disk." macOS will begin backing up automatically, but you cannot restore to a date before you turned it on.

What to do if restore points no longer exist

Windows and macOS delete old restore points automatically to save space. If you are trying to restore to a date more than a few months ago, those snapshots may be gone. You can check what restore points are available by opening System Restore (Windows) or Time Machine (macOS) and looking at the list — if the date you need is not there, it has been deleted.

If your restore points are gone, you have two options. The first is to restore to the oldest available date and see whether that fixes the problem. The second is to reinstall Windows or macOS from scratch. Reinstalling erases everything on your drive, so you would need to restore your personal files from a separate backup afterward. Most people choose this route only if System Restore or Time Machine cannot fix the issue.

When restoring does not solve the problem

Sometimes restoring to an earlier date does not fix the issue because the problem existed before that date, or because it is caused by hardware rather than software. If you restore and the problem persists, try restoring to an even earlier date if one is available.

If multiple restore attempts do not work, the issue may be a failing hard drive, bad RAM, or a virus that survived the restore. At that point, you may need to take your computer to a repair shop or reinstall your operating system completely. Before you do that, try running a malware scan using Windows Defender (Windows) or Malwarebytes (both systems) to rule out infection.

How to prevent problems by enabling restore tools now

If you have not already turned on System Restore or Time Machine, do it now while your computer is working well. On Windows, open Settings, click "System," then "About," scroll down, and click "System protection." Select your drive, click "Configure," choose "Turn on system protection," and click "OK." Windows will begin creating restore points daily.

On macOS, click the Apple menu, go to "System Settings," click "General," then "Time Machine," and click "Add Backup Disk." Plug in an external hard drive and select it. macOS will back up automatically every hour. These backups take up space on your external drive, but they let you recover from almost any software problem without losing your personal files.

Frequently Asked Questions

Will restoring delete my photos, documents, and downloads?

System Restore and Time Machine typically leave your personal files alone. However, if you saved a file after the restore date, that file will not exist after you restore. Back up your important files to an external drive or cloud storage before you start the restore process.

How far back can I restore?

Windows and macOS keep restore points for only a few weeks or months, depending on how much space you have available. Check your restore tool to see what dates are available. If the date you need is gone, you cannot restore to it.

Can I undo a restore if it makes things worse?

Yes. You can run System Restore or Time Machine again and restore to a different date. If you restore and the problem gets worse, restore to the date you were on before, or to an even earlier date.

What if I do not have an external drive for Time Machine?

You can use an external hard drive, a network-attached storage device, or even another Mac on your network. If you have none of these, you cannot use Time Machine. Your only option would be to reinstall macOS from scratch.

Does restoring remove viruses?

System Restore and Time Machine restore your system files, but they may not remove all viruses if the infection is still present in your personal files. After restoring, run a malware scan using Windows Defender or Malwarebytes to check for remaining threats.