有时，在尝试运行Windows Defender时，您可能会看到此消息The Threat Service has stop, Restart it now^{(The Threat Service has stopped, Restart it now)}。如果您单击立即重新启动^{(Restart now)}按钮，服务^(Service)启动，消息消失，很好！但是，如果没有，您反而会看到一条消息Unexpected error，抱歉，我们遇到了问题^{(Unexpected error, Sorry, we ran into a problem)}，那么您可以尝试在Windows 11/10上解决此问题。

威胁服务已在^{(Threat Service)}Windows Defender中停止

1]确保Windows Defender 服务^(Services)已启动

Windows Defender 高级威胁防护^{(Windows Defender Advanced Threat Protection)}服务通过监视和报告计算机上发生的安全事件来帮助防御高级威胁。您需要确保将此服务和其他必需的服务设置为其默认值并启动。

打开 Windows 服务管理器^{(Open Windows Services Manager)}并找到以下服务^(Services)并确保它们的启动^(Startup)类型设置为默认值：

• Windows Defender 高级威胁防护服务 - 手动^{(Defender Advanced Threat Protection Service – Manual)}
• Windows Defender 防病毒网络检查服务 - 手动^{(Defender Antivirus Network Inspection Service – Manual)}
• Windows Defender 防病毒服务 - 手动^{(Defender Antivirus Service – Manual)}
• Windows Defender 防火墙服务 - 自动^{(Defender Firewall Service – Automatic)}。

您可以右键单击它们中的每一个并选择开始^(Start)以启动服务。

要更改Staup类型，您必须双击服务^(Services)并在其属性框中从启动类型^{(Startup type)}的下拉菜单中选择正确的选项。

找到后，双击每个服务并将其启动^(Startup)类型设置为自动^(Automatic)，如果服务尚未运行，请单击启动。^(Start)

单击^(Click)应用^(Apply)，然后单击确定，看看这是否有帮助。

2]编辑注册表

如果上述方法没有帮助，试试这个。

运行^(Run)regedit 打开注册表编辑器^{(Registry Editor)}并转到以下路径 -

HKLM\Software\Policies\Microsoft\Windows Defender

如果右窗格中存在DisableAntiVirus和DisableAntiSpyware DWORD^(DWORDs)，请将值更改为0。

如果它们不存在，则创建两个DWORD^(DWORDs)并将它们的值分别设为0。为此，在右窗格中，右键单击空白处，选择New > DWORD，如上所述命名它们。然后双击它们并给它们一个值 0。

3]检查^(Check)是否缺少所需的服务

打开注册表^(Registry)并检查导航到以下位置，以确定 您的操作系统中是否确实缺少任何一项服务：^(Services)

HKey_Local_Machine\System\CurrentControlSet\Services

• 对于Security Center，向下滚动到SecurityHealthService
• 对于Windows Defender 防病毒服务^{(Windows Defender Antivirus Service)}，向下滚动到WinDefend

如果注册表中缺少任何一个，则需要使用安装媒体修复 Windows^{(repair Windows using installation media)}。

This should help!

Fix The Threat Service has stopped in Windows Defender

Sometimes, when trying to run Windows Defender, you may see this message The Threat Service has stopped, Restart it now. If you click on the Restart now button, and the Service starts, and the message disappears, well and good! But if it does not and you instead see a message Unexpected error, Sorry, we ran into a problem displayed, then here’s what you can try to fix the issue on your Windows 11/10.

The Threat Service has stopped in Windows Defender

1] Ensure that Windows Defender Services are started

The Windows Defender Advanced Threat Protection service helps protect against advanced threats by monitoring and reporting security events that happen on the computer. You need to ensure that this and other required Services are set to their default values and started.

Open Windows Services Manager and locate the following Services and ensure that their Startup type is set to their default values:

• Windows Defender Advanced Threat Protection Service – Manual
• Windows Defender Antivirus Network Inspection Service – Manual
• Windows Defender Antivirus Service – Manual
• Windows Defender Firewall Service – Automatic.

You may right-click on each of them and select Start to start the Service.

To change the Staup types, you have to double-click on the Services and select the correct option from the drop-down menu of Startup type, in its Properties box.

When found, double-click on each of the services and set up their Startup type to Automatic and click on the Start if the services are not already running.

Click on the Apply and then OK and see if this has helped.

2] Edit the Registry

If the above method did not help, try this.

Run regedit to open the Registry Editor and go to the following path –

HKLM\Software\Policies\Microsoft\Windows Defender

If the DisableAntiVirus and DisableAntiSpyware DWORDs are present in the right pane, change the value to 0.

If they are not present, then create the two DWORDs and give them a value of 0 each. To do this, in the right pane, right-click on an empty spot, select New > DWORD, name them as mentioned above. Then double-click on them and give them each a value of 0.

3] Check if the required services are missing

Open Registry and check navigate to the following locations to determine if either of the Services is actually missing in your OS:

HKey_Local_Machine\System\CurrentControlSet\Services

• For Security Center, scroll down to SecurityHealthService
• For Windows Defender Antivirus Service scroll down to WinDefend

If either is missing in your Registry, you need to repair Windows using installation media.

This should help!

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