If you have to run Windows 10 offline/disconnected from the Internet, or you have several PCs and want to save bandwidth, you might want to download the malware definition/signature updates for Windows Defender offline so you can update multiple PCs at once or update it without internet connectivity. In this article, we will see where to get these updates to install them in Windows 10 without downloading them on every PC or connecting to the internet.
Having offline Defender signatures is also useful for those who disabled Windows Update in Windows 10. Microsoft provides a page where the user can download the full signature update. It is redistributed in EXE file format. To install it and update your Windows Defender virus detection signatures, you just need to run it like any other app.
Here is where you can download them.
- Point your browser to the following page:
Security Definitions Download
- Scroll down to the title AntiMalware and antispyware updates
- Select 32-bit or 64-bit update package matching your operating system. See how to determine if you are running 32-bit Windows or 64-bit.
As of this writing, the following download links were available for Windows 10 and Windows 8:
In case, you don't find Windows Defender of any use, you might be interested in reading the following article: Disable or enable Windows Defender in Windows 10. It will help you to turn it off completely.