Windows and Mac both let you roll back your system to a working state
Both Windows and macOS have built-in tools that let you restore your computer to a point before something broke or slowed down. On Windows, this is called System Restore. On Mac, it is called Time Machine. Both work by saving snapshots of your system at regular intervals — usually daily — and letting you revert to one of those snapshots if you need to undo recent changes, remove a problematic update, or recover from malware.
The process is straightforward on either system, takes 15 minutes to an hour depending on how much data you have, and does not require you to reinstall Windows or macOS from scratch. You keep your personal files — documents, photos, downloads — unless you specifically choose to restore those as well.
Key Takeaways
- Windows System Restore reverts system files and settings to a date you choose, leaving your personal files untouched unless you select them.
- Mac Time Machine requires you to set it up beforehand with an external drive, but once running it backs up automatically every hour.
- Both tools work best when you have restore points already saved, which happens automatically if you turn them on before a problem occurs.
- If your computer will not start, you may need to use Windows Recovery Environment or Mac Recovery Mode instead of the standard restore process.
How to use System Restore on Windows
Open the Start menu and type "System Restore" into the search box. Click "Create a restore point" from the results. A window will open showing your system drives — usually just C:. Click the "System Restore" button at the bottom of that window.
A new window titled "System Restore" will appear. Click "Next" and you will see a list of restore points, each with a date and time. The list shows automatic restore points created by Windows, plus any you created manually. Choose the date you want to go back to — ideally one from before the problem started — and click "Next" again. Windows will show you a summary. Click "Finish" and your computer will restart and begin the restore process. This usually takes 15 to 45 minutes depending on how much has changed since that restore point.
If you cannot see any restore points in the list, System Restore may not be turned on for your drive. Go back to the "Create a restore point" window, click the C: drive, then click "Configure". Make sure "Turn on system protection" is selected, then click "OK". Windows will now create restore points automatically going forward, but you will need to wait for the next automatic one or create one manually before you can restore.
How to use Time Machine on Mac
Time Machine requires an external hard drive or network storage connected to your Mac. If you do not have one, you will need to buy one first — a 1 or 2 terabyte external drive costs between $50 and $150 and is the most common choice.
Plug the external drive into your Mac. Open System Settings (or System Preferences on older Macs), click "General" in the sidebar, then click "Time Machine". Click "Add Backup Disk" and select your external drive from the list. Time Machine will begin backing up automatically and will continue every hour as long as the drive is connected or available over your network.
To restore, click the Time Machine icon in the menu bar at the top of your screen and select "Enter Time Machine". A timeline will appear on the right side of your screen showing dates with backups. Click the date you want to restore to, then click "Restore". Your Mac will revert to that point. This usually takes 30 minutes to an hour depending on how much data you have.
What gets restored and what does not
System Restore on Windows restores system files, drivers, installed programs, and Windows settings. Your personal files — documents, photos, videos, downloads, desktop items — stay as they are unless you specifically choose to restore those too. This is usually what you want: you undo a bad Windows update or remove malware without losing the work you did after the restore point was created.
Time Machine on Mac works the same way by default. It restores system files and settings but leaves your personal files alone. However, you can choose to restore your entire Mac to match the backup exactly, which will overwrite any files you created or changed since that backup date. Be careful with this option — it will undo work you did after the backup.
When to create a manual restore point
Windows creates automatic restore points roughly once a week and whenever you install a major update. If you are about to install new software, update a driver, or make changes to system settings, creating a manual restore point first takes 30 seconds and gives you a safety net. Open the Start menu, type "System Restore", click "Create a restore point", then click "Create" in the window that opens. Give it a name like "Before driver update" and click "Create" again.
Mac users cannot create manual Time Machine backups — Time Machine backs up automatically every hour when the drive is connected. If you want a backup before a major change, the simplest approach is to unplug the external drive, make your changes, then plug it back in to create a fresh backup.
What to do if your computer will not start
If your computer will not boot into Windows normally, you can still restore using Windows Recovery Environment. Restart your computer and hold down the F8 key repeatedly as it boots (on some machines it is Shift+F8 or another key — your manufacturer's startup screen will tell you). Select "Troubleshoot", then "Reset this PC" or "System Restore" depending on what appears. Follow the on-screen steps to choose a restore point.
On Mac, restart and hold Command+R as the computer boots to enter Recovery Mode. Click "Restore from Time Machine Backup" and select the backup date you want. This will restore your entire Mac to that point, so use it only when your Mac will not start normally.
Why a restore might not fix your problem
System Restore and Time Machine work well for undoing software changes, but they cannot fix hardware failures like a failing hard drive or a broken power supply. If your computer has a hardware problem, restoring will not help — you will need to replace the part.
Restore also cannot remove all malware. Some malicious software hides in places that restore does not touch, or it may have infected your personal files. If you suspect malware, run a full antivirus scan after restoring, or consider a clean reinstall of Windows or macOS if the problem persists.
Frequently Asked Questions
Will I lose my files if I restore to an earlier date?
Your personal files — documents, photos, downloads — stay as they are by default. System Restore and Time Machine restore system files and settings only. If you choose the option to restore your entire computer, you will lose any files created or changed after the restore point date.
How far back can I restore?
Windows keeps restore points for several weeks by default, but the exact number depends on how much space you have set aside for them. Time Machine keeps backups as long as your external drive has space, which is usually months or years. Check your restore point list to see what dates are available.
Can I restore just one file instead of the whole system?
Time Machine lets you restore individual files. Enter Time Machine, navigate to the date you want, find the file, and click "Restore". Windows System Restore does not restore individual files — it restores the entire system. To recover a single file on Windows, you would need to use File History or a third-party backup tool.
What if the restore point I want is not in the list?
Windows may have deleted old restore points to save space. Create a new restore point now, then try restoring to a more recent date if one is available. If no restore points exist at all, System Restore is probably turned off — turn it on in the System Restore settings and create one manually.
Do I need to unplug my external drive after Time Machine finishes?
You can leave it plugged in. Time Machine will back up automatically every hour. If you want to unplug it to save power or move it, that is fine — just plug it back in when you want the next backup to happen.