Why you might need to disable antivirus temporarily

You may need to turn off your antivirus software for specific tasks — installing legitimate software that triggers false alarms, running older programs incompatible with modern protection, or troubleshooting whether the antivirus itself is causing a problem. The key word is temporary. Disabling antivirus leaves your computer unprotected against real threats, so you should re-enable it as soon as the task is done.

Before you disable anything, ask yourself whether the task actually requires it. Many people assume antivirus is blocking something when the real problem is a network connection, a missing file, or incorrect installation steps. If you are unsure, search for the specific error message plus your antivirus name — you may find a setting to adjust instead of turning the whole program off.

Key Takeaways

  • Disabling antivirus should be temporary and intentional — turn it back on immediately after the task is complete.
  • Most antivirus programs let you disable real-time scanning through their settings menu without uninstalling the software.
  • Some antivirus programs require you to restart your computer before the change takes effect.
  • If you cannot find the disable option in your antivirus settings, check the program's help documentation or support site for your specific version.
  • Never disable antivirus and then browse the internet, download files, or open email attachments — these are the moments you are most vulnerable.

How to disable Windows Defender (built into Windows)

Windows Defender is the antivirus that comes with Windows 10 and Windows 11. To turn off real-time scanning temporarily, open the Windows Security app by typing "Windows Security" into the search box and pressing Enter. Click "Virus & threat protection" on the left side, then click "Manage settings" under "Virus & threat protection settings."

Toggle off "Real-time protection." Windows will ask you to confirm. After you do, the protection stops immediately — you do not need to restart. However, Windows will turn real-time protection back on automatically after a set time (usually one hour) if you do not manually turn it back on sooner. This is a safety feature. When your task is done, go back to the same screen and toggle it back on.

How to disable third-party antivirus programs

If you installed antivirus software yourself — such as Norton, McAfee, Kaspersky, Bitdefender, or Avast — the disable process varies by program. Open the antivirus application itself (not Windows Security). Look for a menu option called "Settings," "Preferences," or "Protection" depending on the brand.

Inside that menu, find an option for "Real-time scanning," "Active protection," "On-access scanning," or "Shield." The exact name depends on the program. Click it and look for a toggle or button to turn it off. Some programs ask you to choose how long to keep it disabled — options might be 15 minutes, 1 hour, or until restart. Choose the shortest time that makes sense for your task. After you finish, return to the same menu and turn protection back on.

If you cannot find the option, open the program's help menu or visit the support section of the company's website. Search for your specific antivirus name plus "disable real-time protection" — the steps differ between versions and between Windows and Mac.

What happens when antivirus is off

When you disable real-time scanning, the antivirus stops watching files as they are downloaded or opened. This means malware can enter your computer without being caught. You are not unprotected forever — the antivirus will scan files again once you turn it back on — but there is a window of vulnerability.

During the time antivirus is off, avoid downloading files from unfamiliar websites, opening email attachments, clicking links in messages, or visiting sites you do not trust. These are the moments when malware spreads most easily. If you must do any of these things, turn the antivirus back on first and wait for it to finish starting up.

Restarting antivirus after you are done

After your task is complete, go back into your antivirus settings and turn real-time protection back on. If your antivirus has a timer that automatically re-enables protection, you can wait for that instead, but it is safer to do it manually so you know it is active again.

Some antivirus programs require a restart to fully re-enable all protections. If you turned off antivirus and then restarted your computer, protection usually comes back on automatically. If you did not restart, check your antivirus status to confirm it says "Protected" or "Active" before you resume normal computer use.

When disabling antivirus does not solve the problem

If you disabled antivirus and the software still will not install or run, the problem is not the antivirus. The issue could be a missing Windows update, a corrupted file, insufficient disk space, or the software itself being incompatible with your version of Windows. Try these steps before assuming antivirus is the culprit: restart your computer, check that you have administrator rights, verify the software is designed for your version of Windows, and search for the error message online.

If you find that a legitimate program keeps being blocked even after you disable real-time scanning, you may need to add it to your antivirus's exclusion list instead of turning the whole program off. This lets the antivirus stay active while allowing that specific program to run. Most antivirus programs have an "Exclusions" or "Whitelist" option in settings.

Uninstalling antivirus versus disabling it

Disabling is not the same as uninstalling. When you disable, the software stays on your computer and can be turned back on. When you uninstall, you remove it completely. You should only uninstall antivirus if you are replacing it with a different program, not as a troubleshooting step. If you uninstall and then forget to install something else, your computer has no protection.

If you want to remove antivirus and install a different one, uninstall the old program through Windows Settings (search "Add or remove programs"), restart your computer, and then install the new antivirus. Do not leave your computer without protection between the two.

Frequently Asked Questions

Will my computer get infected if I disable antivirus for 10 minutes?

Probably not, but it is possible. The risk depends on what you are doing during those 10 minutes. If you are installing software from the publisher's official website and not browsing the internet, the risk is low. If you are downloading files from unknown sources or opening email attachments, the risk is much higher. Keep the window as short as possible.

Why does my antivirus keep turning back on by itself?

Many antivirus programs automatically re-enable protection after a set time as a safety feature. This is intentional — it prevents you from accidentally leaving your computer unprotected. Check your antivirus settings to see if you can adjust how long it stays off, or simply turn it back on manually when you are done with your task.

Can I disable antivirus on my phone the same way?

Most phones do not have antivirus software in the same way computers do. iPhones have built-in protections you cannot disable. Android phones may have Google Play Protect, which you can turn off in Google Play Store settings, but this is rarely necessary. If an app is not installing, try restarting your phone or checking that you have enough storage space before disabling any protection.

What if I disabled antivirus and now my computer is running slowly?

Antivirus software uses computer resources, so turning it off should make your computer faster, not slower. If your computer is slow after disabling antivirus, the slowness is caused by something else — possibly the task you are running, or a different program using resources. Turn antivirus back on and see if the speed returns. If it does not, the antivirus was not the cause.