https://www.microsoft.com/en-us/wdsi/defenderupdates
Enterprise administrators can also push updates to devices in their network. To clear the current cache and trigger an update, use a batch script that runs the following commands as an administrator:
cd %ProgramFiles%\Windows Defender MpCmdRun.exe -removedefinitions -dynamicsignatures MpCmdRun.exe -SignatureUpdate
Manually download the update
You can manually download the latest update.
Latest security intelligence update
The latest security intelligence update is:
- Version: 1.417.263.0
- Engine Version: 1.1.24070.3
- Platform Version: 4.18.24070.5
- Released: 8/23/2024 9:23:20 AM
- Documentation: Release notes
You need to download different security intelligence files for different products and platforms. Select the version that matches your Windows operating system or the environment where you will apply the update.
Note: Starting on Monday October 21, 2019, the Security intelligence update packages will be SHA2 signed.
Please make sure you have the necessary update installed to support SHA2 signing, see
2019 SHA-2 Code Signing Support requirement for Windows and WSUS.
| Microsoft Defender Antivirus for Windows 11, Windows 10, Windows 8.1, and Windows Server | 32-bit | 64-bit | ARM |
| Microsoft Security Essentials | 32-bit | 64-bit |
| Windows Defender in Windows 7 and Windows Vista | 32-bit | 64-bit |
| Microsoft Diagnostics and Recovery Toolset (DaRT) | 32-bit | 64-bit |
| System Center 2012 Configuration Manager | 32-bit | 64-bit |
| System Center 2012 Endpoint Protection | 32-bit | 64-bit |
| Windows Intune | 32-bit | 64-bit |
The links point to an executable file named mpam-fe.exe, mpam-feX64.exe, or mpas-fe.exe (used by older antispyware solutions). Simply launch the file to manually install the latest security intelligence.
End of life for Microsoft Forefront Client Security was on July 14, 2015. Customers are encouraged to migrate to System Center Endpoint Protection. For more information, visit the Microsoft support lifecycle website.
Network Inspection System updates
The following products leverage Network Inspection System (NIS) updates:
- Microsoft Security Essentials
- Forefront Endpoint Protection
- System Center 2012 Endpoint Protection
These updates are designed to protect you from network threats, including exploits as they are transmitted. Check the version of the Antimalware Client component on your security software and download the right version of the NIS updates for your platform.
