Fix Windows Defender Error 0x800b0100 – An error has occurred in the program during initialization

Yes Windows Defender on Windows 10 you have problems opening it for analysis, you can get help from this article. The error code 0x800b0100 may occur for unknown reasons, but you can correct it using this guide. To be precise, the whole error message says something like this-

An error occurred in the program during initialization. If this problem persists, contact your system administrator. Error code: 0x800b0100

Different people have encountered this problem at different times. The most common situation is that they detected a certain delay in their system and tried to open the Windows Defender to scan it. If you are one of the victims, the following troubleshooting guides may be helpful.

0x800b0100, an error occurred in the program during initialization

To fix Windows Defender error code 0x800b0100, follow these suggestions –

1. Restart Windows Defender services
2. Reset Defender Defaults
3. Run the System File Checker tool
4. Run DISM to repair the system image
5. Use the Fresh Start option in Windows 10
6. Perform a repair upgrade

1]Restart Windows Defender services

If your computer contains malware, it is likely that it has already disabled all services related to Windows Defender. You need to check whether all the services are working or not.

Open Windows Service Manager and locate the following four services:

• Windows Defender Antivirus Service
• Windows Defender Antivirus Network Inspection Service
• Windows Defender Advanced Threat Protection Service
• Windows Defender firewall.

You can stop and start them or simply use the Restart option, available in the right-click context menu.

2]Reset Defender Defaults

You can use our free FixWin software to reset Windows Defender to default settings.

3]Run the System File Checker tool

System File Checker is a command line utility that helps you find and fix potentially corrupted system files, respectively. You must run the following command in an elevated command prompt window.

sfc /scannow

4]Run DISM to repair the system image

DISM or Deployment Image Servicing and Management is a command line tool that allows you to solve problems with a conventional system like this. It can detect various hardware drivers and software problems and correct them accordingly. The best thing is that you don’t need to download any software to run it since it is a command line tool, as mentioned before. This means that you need to open an elevated command prompt window and enter certain commands. To run DISM to repair the Windows system image, run the following command:

dism /Online /Cleanup-Image /RestoreHealth

You can run SFC and DISM, one after the other. If you are unsure which one to run, follow this guide where we explained if you should run DISM or SFC first.

5]Use the Fresh Start option in Windows 10

The Fresh Start option will give you a whole new system with all the problems excluded. He:

1. Keep all your data,
2. Remove all third party apps,
3. Force Windows 10 updates to the latest version.

6]Perform a repair upgrade

You may need to repair Windows 10 using the installation media. This solution will help you repair your system from top to bottom, and it is also reliable. However, you need Windows 10 ISO and create a bootable USB drive to start this process.

These solutions should help you to get rid of error code 0x800b0100 in Windows Defender.

Related readings:

1. Cannot activate Windows Defender in Windows 10

2. Windows Defender is disabled or does not work.

• Keywords: Errors, Windows Defender