If you do your research on the Internet, you may come to ' Security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware' Microsoft's page at some point. Troubleshoot installing Windows Defender definitions updates Error detected: 0x800b0109.Ī certificate chain was processed but ended with a root certificate that is not trusted by the trust provider.Ģ. The program cannot install definition updates. In the 'Update Status' section, you will also see this : Then, Windows Defender shows you that it's not up to date with an orange message asking you to check for updates. Windows Defender even tries to download them.

Windows Defender can find definition updates from the Microsoft Security Portal. So, you click on this message and Windows Defender appears.Ĭhecking for updates for Windows Defender starts. However, if in your case Windows Defender is still on, you may have already had a message from Windows 7 asking you to update Windows Defender. In our case, our anti-virus automatically disables Windows Defender. Windows Defender no longer wants to update

Troubleshoot installing Windows Defender definitions updatesġ.

Windows Defender no longer wants to update.

However, it's also possible that you have never seen it since the installation of an anti-virus often tends to deactivate this anti-malware built into Windows 7 to prevent Windows Defender and your new anti-virus come into conflict. If you are still on Windows 7, you may have already noticed that there is an anti-malware named : Windows Defender.

Turn on windows defender windows 7