Security intelligence version: current security intelligence updates for Defenderīecause they change daily (or more often), signatures get updated all the time.Engine version: specific anti-malware engine version for Windows 10 or 11.Platform version: signatures for a specific edition of Windows 10 or 11 (Home, Pro, Education, etc.).Microsoft maintains a web page specifically for Defender updates entitled “ Microsoft Defender update for Windows operating system installation images.” It identifies three components that make up the Defender environment, all of which are subject to periodic updates: IDGįigure 4: The “Security intelligence” item shows the version number, creation date, and update time for current signatures. Note that the “Check for updates” button also appears in this screen capture you could also use this to implement the preceding update method. As shown in Figure 4, I updated the signatures (called “security intelligence version”) to version number 1.395.1156.0 through the command line at 3:41 PM on August 23, 2023. You can always check the protection update info by clicking Virus & threat protection inside Windows Security, then scrolling down to “Virus & threat protection updates,” then clicking on Protection updates. (The previous line shows that Windows 11 is running.) (If you watch while it runs, it does report progress this screencap shows what things look like upon completion.įigure 3: Using PowerShell to update Defender signatures. Although it doesn’t appear to do much inside PowerShell, the command does indeed update the Defender signatures. This command works on Windows 10 and 11 versions alike (as shown in Figure 3 for Windows 11). The simple, basic syntax for this command is to simply type the command name - Update-MpSignature - in PowerShell. There’s a special PowerShell command for updating Defender security definitions (also known as signatures). In such circumstances, there’s yet another way to forcibly update Microsoft Defender, covered in the section that follows. At other times, it, too, fails to download updates when WU is completely stuck and won’t download anything. I have seen it work sometimes when WU is stuck on some specific update. Note: this download process goes through Windows Update in the background. IDGįigure 2: Click Protection updates (Windows 11) or Check for updates (Windows 10) to do just that. (The Check for updates link in Windows 10 does the same thing.) If any updates are available, it will download and install them. In Windows 11, you can click the Protection updates link shown at the bottom of the image to instruct Defender to check for updates. Note the entry under “Virus & threat protection updates” near the bottom. Clicking this produces an app pane like the one shown in Figure 2. The Windows Security app includes numerous entries, including the “Virus & threat protection” item that also appears in Figure 1. IDGįigure 1: Within Settings, the Open Windows Security button takes you to Defender’s controls. Alternatively, you can open the app directly by typing windows security into the Start menu. There you’ll find a button labeled Open Windows Security, as shown in Figure 1. Within the Settings app, you can access a Windows Security facility with this selection sequence: Start > Settings > Update & Security > Windows Security in Windows 10 or Start > Settings > Privacy & Security > Windows Security in Windows 11.
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