Do I need to disable anti-virus software before installing Windows 11

An anti-virus is required on a Windows system. There are many different anti-virus apps to choose from. They run on your desktop like any other app but have far higher read / write privileges than any other app. They basically keep gateways to what can and cannot run on your system.

disable anti - virus software before installing Windows 11

Turn off anti-virus software before installing Windows 11

If you are installing Windows 11 and you are wondering if your anti-virus is causing problems, the easiest way to find out is to start the update. Ideally, if the virus has problems with the update, it will stop when you try to start. You can clear the process or disable the anti-virus before updating.

In some cases, however, the upgrade and failure may start at a later stage. It may have failed with just an error code and no clear indication that it was blocked by the anti-virus. It is usually more difficult to determine if there is a break in the update process in the middle. In this case, you can try the following.

Check out the Anti-virus product page and forums

It is always best to do this before you start the update process. Visit the product page for the virus you are using. Check for any updates to Windows 11. A good anti-virus will clear the OS and its files. If there is a problem or process that allows you to smoothly upgrade to Windows 11 while keeping anti-virus going, your product page or forums should tell you as much.

On that note, check if other users are having trouble upgrading to Windows 11 with the anti-virus running. If they are, it is best to turn it off while the update is in progress.

Enable Windows Defender

You can temporarily disable the anti-virus and enable Windows Defender instead. It is possible that the Windows 11 update process considers a system that is not running Windows Defender dangerous. Windows Defender will not block the update and is a good anti-virus. Turn off your third-party anti-virus for Windows Defender. When the update is complete, you can go back to using your favorite tool.

Clean install Windows 11

If you plan to install Windows 11 cleanly, the anti-virus installed on your system in the default OS, whatever the OS may be, is arbitrary. The anti-virus will not run once you start the clean installation and therefore cannot stop the installation process.

Virus vs disk protection

You should know that there is a difference between virus and disk protection. An anti-virus is an app that runs in an operating system like Windows 10. For it to work, it must have the environment ie, Windows 10 running.

Disk protection is disk protection in the form of encryption. A disk cannot be accessed, once it is encrypted or password protected unless the password is provided or decrypted. Disk protection does not require OS to be present to operate. You may have installed disk protection through desktop OS but it will work externally as well.

If you’re upgrading to Windows 11, and you can’t access or write to disk, you may have some sort of protection installed that you need to remove first.


Windows 11 update so far has been smooth. There are still low numbers of them with many users choosing to stick with Windows 10 which is now much more stable. That said, your virus shouldn’t bother you yet. If the installation failed, check for logs and errors that may tell you why it failed.

The post Do I need to disable anti – virus software before Windows 11 first appears on TechtricksNg.