> Source: [sk181318](https://support.checkpoint.com/results/sk/sk181318)

# sk181318 - How to configure Windows Defender when Harmony Endpoint Security Client is installed

| Property | Value |
|----------|-------|
| Solution ID | sk181318 |
| Date Created | 2023-08-20 |
| Last Modified | 2023-08-22 |
| Technical Level | General |
| Products | Endpoint Security |
| Versions | Cloud, R82.20, R82.10, R82, R81.20 |
| OS | Windows |

## Symptoms

- To configure Windows Defender when Harmony Endpoint Security Client is installed.

## Solution

**Microsoft Windows Defender** operates in three modes:  

* Active
* Passive
* Disabled or Uninstalled

For more information on these modes, see [https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/microsoft-defender-antivirus-windows?view=o365-worldwide\&viewFallbackFrom=o365-worldwide.](https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/microsoft-defender-antivirus-windows?view=o365-worldwide&viewFallbackFrom=o365-worldwide.).  

For the Harmony Endpoint Security Client Anti-Malware capability to function correctly, Windows Defender must be set to **Passive** or **Disabled/Uninstalled** mode.   

For Windows laptops and desktops, the Harmony Endpoint Security Client automatically sets Windows Defender to **Passive** or **Disabled/Uninstalled** mode.  

For Windows servers, you must manually set the Windows Defender mode to **Passive** or **Disabled/Uninstalled** mode.  

For more information, see [sk159373](https://support.checkpoint.com/results/sk/sk159373).

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