In the “Windows Defender Antivirus for Windows 10” section, select the download in the required bit depth.
Download definitions Windows Defender After downloading, run the downloaded file, and after the installation (which can visually pass “quietly” without the installation windows appear) go to the Windows Defender Security Center – Protection from viruses and threats – Security updates and see the version of the threat definition.
To get support and keep the system working smoothly, it’s vital to install Windows Updates regularly.
Therefore, to fix the 0x80072af9 bug, it’s advisable to run Windows Updates: team is trying to do its best to help users find the best solutions for eliminating their errors.
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Windows Defender is a signature-based anti-virus owned by Microsoft, which comes by default with Windows 10 operating system.
However, if Windows Defender lacks for the latest definitions, it may fail in detecting the newest cyber threats.In this case, as a rule, other Windows 10 updates are installed normally.To manually install the latest Windows Defender definitions from the Microsoft website The first and simplest method that usually helps with error 0x80070643 in this case is to download the definitions of Windows Defender from the Microsoft website and install them manually. Go to https:// and go to the Manually download and install the definitions section.If you don't want to struggle with manual repair techniques, please use the automatic software.All recommended products have been tested and approved by our professionals.The error won’t let to install the latest definition update, what means that your operating system may have some security breaches.To fix Windows Defender error code 0x80072af9, you should try the following methods. Therefore, make sure to disable any third-party anti-virus (or even remove it).Tools that you can use to fix your error are listed bellow: This patented repair process uses a database of 25 million components that can replace any damaged or missing file on user's computer. Hall is an expert troubleshooter who has been working in the information technology industry for years. To repair damaged system, you have to purchase the licensed version of Reimage malware removal tool. One of the current Windows Defender definition update errors is 0x80072af9.Usually, it shows up immediately when a PC’s owner opens Windows Defender or attempts to check for updates.