What Safe Mode Does and When to Use It

Safe Mode is a diagnostic state where your computer starts with only the bare minimum programs and drivers it needs to run. It loads Windows or macOS without third-party software, browser extensions, or many hardware drivers. You use Safe Mode when your computer is crashing, freezing, or behaving strangely — it helps you figure out whether the problem is caused by something you installed or by Windows itself.

Safe Mode is not a repair tool. It does not fix anything on its own. What it does is let you troubleshoot by removing variables. If your computer works fine in Safe Mode but crashes in normal mode, you know the culprit is something that only loads during startup — a driver, an extension, or a background program. If it still crashes in Safe Mode, the problem is likely Windows itself or your hardware.

You might also enter Safe Mode to uninstall a program that is causing problems, to run antivirus software, or to access files when Windows will not start normally. Safe Mode with Networking adds internet access, which is useful if you need to download a driver or search for solutions.

Key Takeaways

  • On Windows 10 and 11, hold Shift while clicking the restart button, or press Windows key + R, type msconfig, go to the Boot tab, check Safe Boot, and restart.
  • On Mac, restart your computer and hold the Shift key immediately after you hear the startup sound until you see the login screen.
  • Safe Mode loads only essential Windows or macOS files, so programs, extensions, and many drivers will not run.
  • If your computer works normally in Safe Mode but crashes otherwise, the problem is likely a program or driver you installed, not Windows itself.
  • To exit Safe Mode, restart your computer normally or undo the Safe Boot setting in msconfig.

Starting Safe Mode on Windows 10 and 11

The fastest way is to restart while holding Shift. Click the Start button, click the power icon, hold Shift on your keyboard, and click Restart. Keep holding Shift until you see a blue screen with troubleshooting options. Click Troubleshoot, then Advanced Options, then Startup Settings. Click Restart. Your computer will restart and show a menu with numbered options. Press 4 for Safe Mode, or 5 for Safe Mode with Networking.

If that does not work — for example, if your computer will not start at all — use the System Configuration tool instead. Press Windows key + R to open the Run box, type msconfig, and press Enter. Click the Boot tab. Check the box next to Safe Boot. Under Safe Boot, choose Minimal (for Safe Mode) or Network (for Safe Mode with Networking). Click OK and restart your computer. Windows will boot into Safe Mode. When you are done troubleshooting, open msconfig again, uncheck Safe Boot, and restart to return to normal mode.

A third option is to use a Windows installation disc or USB drive if your computer will not start at all. Insert the disc or USB, restart, and follow the prompts to access recovery options. This is less common and usually only necessary if Windows is severely damaged.

Starting Safe Mode on Mac

Restart your Mac. Immediately after you hear the startup sound, press and hold the Shift key. Keep holding it until you see the login window. This is Safe Mode on Intel Macs and older Apple Silicon Macs. On newer Apple Silicon Macs (M1, M2, M3 and later), the process is the same: restart, hold Shift at the startup sound, and release when you see the login screen.

Safe Mode on Mac is called Safe Boot. Your Mac will take longer to start because it is checking the disk and loading only essential software. You will see "Safe Boot" in the upper right corner of the login screen. Log in as you normally would. When you are done, restart without holding Shift to return to normal mode.

If your Mac will not start at all, you can also try restarting into Recovery Mode by holding Command + R at the startup sound. This gives you access to Disk Utility and other repair tools, though it is not the same as Safe Mode.

What You Can and Cannot Do in Safe Mode

In Safe Mode, many programs will not run. Microsoft Office, Adobe Creative Suite, Spotify, Discord, and most third-party software will not start. Browser extensions are disabled. Printers, external drives, and other hardware may not work. This is intentional — Safe Mode strips away everything except what Windows or macOS needs to function.

You can still use File Explorer (Windows) or Finder (Mac) to browse your files, access Settings or System Preferences, and run built-in tools like Disk Cleanup, Device Manager, or Disk Utility. You can uninstall programs through Control Panel or System Preferences. You can run Windows Defender or other built-in antivirus tools. On Safe Mode with Networking, you can browse the internet and download files, though some websites may load slowly or incompletely.

If you need to use a specific program to troubleshoot, Safe Mode is probably not the right tool. For example, if you need to run a third-party antivirus program, you may need to boot from a recovery disc instead.

Troubleshooting Common Problems in Safe Mode

If your computer crashes or freezes in normal mode but runs fine in Safe Mode, the problem is almost certainly a driver, a program, or a browser extension. Start by uninstalling recently installed software. Open Control Panel (Windows) or System Preferences (Mac), find Programs and Features or Applications, and uninstall anything you added in the last few days. Restart in normal mode and test.

If that does not work, check Device Manager (Windows) for drivers with warning symbols. Right-click the device and choose Update Driver or Uninstall Device. If you uninstall, restart and Windows will reinstall the default driver. On Mac, Safe Mode automatically runs a disk check, so if you see a message about disk errors, restart in normal mode and run Disk Utility from Recovery Mode.

If your computer still crashes in normal mode after uninstalling recent software, try disabling startup programs. On Windows, open Task Manager (Ctrl + Shift + Esc), click the Startup tab, and disable programs you do not recognize. Restart and test. On Mac, go to System Preferences, Users and Groups, Login Items, and remove programs you do not need at startup.

When Safe Mode Does Not Help

If your computer crashes or freezes the same way in Safe Mode as it does in normal mode, the problem is likely hardware or a core Windows file. This is less common but more serious. Run the built-in diagnostics: on Windows, open Settings, go to System, About, and look for a Diagnostics option. On Mac, restart and hold D to enter Apple Diagnostics.

If diagnostics show no problems, try running a full antivirus scan in Safe Mode with Networking. Download Windows Defender Offline (Windows) or use the built-in Malware Removal Tool. If the problem persists after a clean scan, you may need to reinstall Windows or contact a technician. Do not attempt a major repair without backing up your files first.

Frequently Asked Questions

Will Safe Mode delete my files or programs?

No. Safe Mode only changes what loads at startup. Your files and installed programs remain on your computer. When you exit Safe Mode and restart normally, everything returns to how it was. The only exception is if you manually uninstall a program while in Safe Mode — that removal is permanent.

Why is my computer so slow in Safe Mode?

Safe Mode disables many drivers and runs fewer background processes, so your computer uses less power and memory. However, some tasks like disk checks (on Mac) or file system scans (on Windows) can make startup slower. This is normal and temporary.

Can I use the internet in Safe Mode?

Only if you choose Safe Mode with Networking (Windows) or if your Mac is connected via Ethernet. On Windows, Safe Mode alone has no network access. On Mac, Safe Boot does not include networking by default, but Ethernet connections may still work.

How do I know if I am in Safe Mode?

On Windows, "Safe Mode" appears in the corners of your screen. On Mac, you will see "Safe Boot" in the upper right corner of the login screen. Both are easy to spot.

What if I cannot get into Safe Mode at all?

If your computer will not start even in Safe Mode, the problem is likely hardware failure or severe Windows corruption. Try restarting multiple times — sometimes Windows will repair itself automatically. If that does not work, you may need a Windows installation disc or professional repair.