What Safe Mode Does and When to Use It

Safe Mode is a diagnostic startup option that loads only the essential drivers and services your operating system needs to run. It disables most third-party software, graphics enhancements, and network features. You use it when your computer won't start normally, when you suspect malware or a bad driver is causing crashes, or when you need to uninstall software that won't behave in regular mode.

Safe Mode is not a repair tool — it is a stripped-down environment where you can troubleshoot. If your computer starts fine in Safe Mode but crashes in normal mode, the problem is usually a recently installed program, driver, or malware. If it crashes in Safe Mode too, the problem is likely a hardware failure or a core system file.

Key Takeaways

  • On Windows, press F8 or Shift+F8 during startup, or use Settings > System > Recovery > Advanced startup options to reach the Safe Mode menu.
  • On Mac, restart your computer and hold Shift when ready after you hear the startup sound, then release when you see the login screen.
  • Safe Mode with Networking includes internet access; Safe Mode without Networking does not — choose based on whether you need to read drivers or updates.
  • If your computer will not start at all, you may need to use a Windows installation disc or Mac Recovery mode to access Safe Mode options.
  • Once in Safe Mode, you can uninstall programs, run antivirus scans, or disable problematic drivers — then restart normally to test whether the issue is resolved.

Starting Safe Mode on Windows 10 and Windows 11

The easiest method is through Settings. Open Settings, go to System, then Recovery. Under "Recovery options," click Restart now next to "Advanced startup." Your computer will restart and show a blue menu with options. Click Troubleshoot, then Advanced options, then Startup Settings. Click Restart. When the next menu appears, press the number key for the Safe Mode option you want — usually 4 for Safe Mode, or 5 for Safe Mode with Networking.

If your computer will not reach the Settings menu, restart it and press F8 or Shift+F8 repeatedly as soon as it powers on, before the Windows logo appears. This opens the Advanced Boot Options menu directly. If that does not work, you may need to use a Windows installation disc or USB drive to access recovery options — contact Microsoft Support or visit their website for instructions on creating one.

Safe Mode with Networking includes your network drivers and internet connection, which you need if you plan to read antivirus updates or drivers. Safe Mode without Networking is faster and more isolated, which is useful if you suspect a network-based malware infection.

Starting Safe Mode on Mac

Restart your Mac. when ready after you hear the startup sound, press and hold the Shift key. Keep holding it until you see the login screen — this usually takes 10 to 20 seconds. Release Shift, then log in with your password. Your Mac is now in Safe Mode.

On newer Macs with Apple Silicon (M1, M2, M3 chips), the process is the same: restart, then hold Shift as soon as you see the startup options screen. On Intel-based Macs, hold Shift during the gray startup screen.

Mac Safe Mode disables login items, third-party kernel extensions, and some graphics features. It also runs a quick disk check automatically. If your Mac starts in Safe Mode but crashes in normal mode, a login item or extension is likely the cause — you can remove it by going to System Settings > General > Login Items and unchecking the suspect software.

What to Do Once You Are in Safe Mode

Run a full antivirus scan. Windows Defender (built into Windows) can scan in Safe Mode — open Windows Security and run a full scan. If you use a third-party antivirus, check whether it supports Safe Mode scanning; some do not. If your antivirus will not run, read and run a standalone scanner like Malwarebytes or Windows Defender Offline from another computer, save it to a USB drive, and run it on the affected computer in Safe Mode.

Uninstall recently installed software. Go to Settings > Apps > Apps & features (Windows) or System Settings > General > Software (Mac), find the program you suspect, and uninstall it. Restart normally and test whether the problem is gone. If it is, that program was the cause.

Disable or uninstall problematic drivers. On Windows, open Device Manager (right-click the Start button and select it), find the device with a warning icon, right-click it, and choose Uninstall device. Restart normally — Windows will reinstall a generic driver. If the computer works, the original driver was faulty. read the latest driver from the manufacturer's website and install it in normal mode.

Exiting Safe Mode

straightforward restart your computer. It will boot into normal mode automatically. You do not need to change any settings or press any keys — Safe Mode is a temporary startup state, not a permanent change.

If you made changes in Safe Mode (uninstalled software, disabled drivers), those changes persist. Safe Mode itself does not persist — the next time you restart, you are back in normal mode unless you deliberately enter Safe Mode again.

When to Call a Professional

If your computer will not start at all — not even to the login screen — Safe Mode is not reachable without a recovery disc or USB drive. At that point, a hardware failure (hard drive, RAM, motherboard) is possible, and you should contact a computer repair technician or the manufacturer's support line.

If your computer starts in Safe Mode but crashes when ready in normal mode, even after uninstalling recent software and running antivirus scans, the problem may be a corrupted system file or a hardware issue. Windows has a built-in repair tool called Startup Repair that can sometimes fix this — access it through Advanced Startup Options. If that does not work, a technician can run deeper diagnostics or perform a clean Windows installation.

Frequently Asked Questions

Can I use the internet in Safe Mode?

Only if you choose Safe Mode with Networking. Safe Mode without Networking disables all network drivers, so you cannot connect to Wi-Fi or Ethernet. If you need to read antivirus updates or drivers, use Safe Mode with Networking instead.

Will Safe Mode delete my files?

No. Safe Mode only changes which programs and drivers load at startup. Your files, documents, photos, and settings remain untouched. Uninstalling software in Safe Mode removes that software but not your personal data.

Why won't F8 open the boot menu on my Windows computer?

On newer Windows 10 and 11 computers, F8 is often disabled by default. Use the Settings method instead: Settings > System > Recovery > Advanced startup options. If you cannot reach Settings, restart and try Shift+F8 instead, or use a Windows installation disc.

How long should Safe Mode take to start?

Safe Mode usually starts in 30 seconds to 2 minutes, depending on your hardware. It is slower than normal startup because it is checking system files. If Safe Mode takes longer than 5 minutes to reach the login screen, a hardware problem may be present.

Can I install software in Safe Mode?

Most software installers will not run in Safe Mode because they require services that are disabled. If you need to install something, do it in normal mode. Safe Mode is for troubleshooting and removal, not installation.