What to do if Windows Defender conflicts with Avast? How to solve the problem of Windows Defender blocking Avast in Windows 10/11 system? This article will answer these questions and provide detailed solutions provided by MiniTool.

Windows Defender blocks Avast antivirus software

As we all know, Windows Defender (or Windows Security Center) is a built-in antivirus software that can effectively protect your computer and prevent viruses and malicious programs from being infected. However, when using Windows Defender in Windows 10/11 systems, you often encounter some problems, such as Windows Defender is constantly shut down, not working properly, or error codes 0x80073afc, 0x800b0100, 0x800704ec, etc.

Additionally, a common problem is that Windows Defender blocks Avast. You should know that Windows Defender cannot run simultaneously with other firewall-capable antivirus software, such as Avast antivirus software. Avast and Windows Defender conflict, causing Windows Defender to block Avast.

In addition to conflict issues, if Windows Defender detects that Avast installation files are corrupted, it may also prevent Avast from running. Avast version is too old and can also cause this problem. Whatever the reason, you can try the following methods to solve the problem of Windows Defender blocking antivirus software.

If Windows Defender blocks Avast

Uninstall Avast and delete all related files

As mentioned above, the main reason why Windows Defender blocks Avast is that there is a conflict between the two. Therefore, the best way is to uninstall Avast and delete all residual files in your Windows 11/10 system. The specific steps are as follows:

Step 1: Visit the official Avast website ( http://ipnx.cn/link/b025801b78399a165d40f04c78399463 .

Step 2: Press Win R , enter msconfig and click OK . Then, under the Startup tab, select Safe Boot , click OK , and restart the computer to enter Safe Mode.

Step 3: Right-click on the downloaded .exe file and select Run as administrator .

Step 4: Select your Avast product, click the Uninstall button to uninstall Avast and clear all files.

After uninstalling, you can choose to reinstall the latest version of Avast to see if Windows Security Center still blocks it.

Disable Windows Defender

When Windows Defender conflicts with Avast, it may prevent Avast from running properly. You can try to disable Windows Defender to resolve this issue.

Step 1: Enter Windows Security Center in the Windows search bar and open this antivirus program.

Step 2: Click Virus and Threat Protection > Manage Settings .

Step 3: In the Real-Time Protection section, disable this feature. If the user account control prompt appears, click Yes .

Stop participating in the Insider preview program

Sometimes, due to system instability, Windows Defender blocks Avast only occurs on systems running the Insider preview version. To resolve this issue, you can try to stop participating in the Insider preview program.

Step 1: Press Win R , enter ms-settings:windowsinsider in the dialog box, and then click OK to open the Windows Insider plan window.

Step 2: Click the Stop Insider Preview Version button, and then click Yes to confirm.

Step 3: Select Roll me back to the latest Windows version .

Step 4: Restart the computer and restore it to the latest stable version.

Backup files

No matter which antivirus program you run, you can easily prevent your computer from virus attacks and threats. However, running antivirus software alone is not enough to protect your important data. Because some stubborn viruses or malicious programs cannot be detected by Windows Security Center or Avast, resulting in data loss. Therefore, it is better for you to back up important data regularly.

For this purpose, MiniTool ShadowMaker is a good choice. As a free backup software, it is good at backing up files, folders, systems, disks and partitions. It supports planned backups and differential/incremental backups. Just download this software and try it out.

To learn how to automatically back up files, see our previous article:

• How to backup only new or changed files in Windows 11/10? Two methods
• Three ways to easily create automatic file backups in Windows 10/11

Conclusion

Will Avast and Windows Defender conflict? The answer is yes, you may often encounter issues with Windows Defender blocking Avast on Windows 10/11 systems. After reading this article, you learned some solutions and just try it out to solve the problem.

The above is the detailed content of How to Fix Windows Defender Blocking Avast? 3 Ways to Try! - MiniTool. For more information, please follow other related articles on the PHP Chinese website!