How To Fix Norton Antivirus Error 21

Norton antivirus is used and loved by millions of people around the world. It not only offers antivirus protection but also comes with real-time threat protection, password manager, firewall, and more. The chance for an error to occur with the Norton antivirus software is very low. However, there are some errors encountered by the users. On this page, you’re going to see how to fix the Norton antivirus error 21 on your computer. The Norton error 21 occurs when the Windows registers related to the Norton antivirus software are not configured correctly. To fix this error code, try the simple and quick troubleshooting instructions given below. Initially, restart your computer because, in most cases, it can resolve these kinds of errors. After restarting your computer, check if the Norton error 21 is fixed. If not, perform the next method given below.

Method 1: Repairing the Windows app

Step 1:On the Settings screen, choose the Apps option followed by Apps & Features. Choose the Windows app that you wish to repair.

Step 2:Click Modify > Yes > Repair.

Step 3:After the selected app is repaired, check if Norton error 21 is fixed.

Step 4:If not, perform the next method given below,

Method 2: Reinstalling the Norton antivirus software

Reinstalling Norton can help you to resolve these kinds of errors. To reinstall the Norton antivirus on your computer, use the Norton Remove and Reinstall tool.

Step 1:Download and run the Norton Remove and Reinstall tool on your computer.
Step 2:Click Agree > Remove and Reinstall > Continue.

Step 3:Now, the latest version of Norton antivirus will start to download.
Step 4:Once the installer file is downloaded, the existing software will be uninstalled, and your computer will begin to restart.
Step 5:After your computer restarts, run the installer file and follow the on-screen instructions to complete the reinstallation process.

If the reinstallation process also failed to resolve the Norton error 21 on your computer, then contact us.