一些Windows 11/10 PC 用户报告了这样一个问题，即即使在运行完整的系统防病毒扫描并因此隔离/删除了有问题的恶意软件之后， Windows Defender也会反复识别相同的威胁。

即使在移除后，Windows Defender 也会反复识别相同的威胁

即使在移除后，Windows Defender也会反复识别相同的威胁^(Defender)

如果您遇到此问题，您可以尝试以下我们推荐的解决方案（不分先后顺序），看看是否有助于解决问题。

清除浏览器缓存
使用第三方工具运行 AV 扫描
将扫描^(Scans) 历史记录^(History)文件夹添加到Microsoft Defender排除列表
清除Windows Defender 保护历史记录^{(Windows Defender Protection History)}。

让我们看一下关于列出的每个解决方案所涉及的过程的描述。

1]清除浏览器缓存

如果您之前在系统上感染了恶意软件，该恶意软件已被删除，但 Web 浏览器的设置仍保持不变，则Windows Defender可能会以这种方式标记基于浏览器的可疑行为。在这种情况下，请检查您的浏览器是否存在潜在危险的扩展程序。如果您找不到任何可疑的扩展程序、加载项或其他基于浏览器的内容，请尝试清除浏览器缓存^{(clear the browser cache)}。

2]使用第三方工具运行 AV扫描^{(Run AV)}

该错误可能是检测结果为误报，这意味着您的计算机上没有恶意软件。尽管如此，建议使用任何有信誉的按需独立防病毒软件^{(on-demand standalone antivirus software)}运行 AV 扫描，并运行 Windows Defender 启动时扫描^{(run a Windows Defender Boot-Time scan)}作为附加措施。

3]将扫描^{(Add Scans)} 历史^(History)文件夹添加到Windows Defender排除^{(Windows Defender Exclusion)}列表

Windows Defender存储扫描结果、隔离项目和已删除威胁的日志。因此，当您执行完整的系统扫描时，该工具可能会扫描自身并将其日志检测为潜在威胁。在这种情况下，您可以将扫描历史文件夹添加到 Windows Defender 排除列表中^{(add the scans history folder to the Windows Defender exclusion list)}- 当您单击+ Add an exclusion按钮并从下拉列表中选择文件夹时，将下面的目录路径复制并粘贴到^(Folder)文件夹^(Folder)栏中的选择文件夹^{(Select Folder)}窗口，然后按 Enter。

C:\ProgramData\Microsoft\Windows Defender\Scans\History

在 UAC 提示上单击是。^(Yes)

如果这不能解决问题，请尝试下一个解决方案。

4]清除Windows Defender保护历史^{(Windows Defender Protection History)}

与上述类似，但在这种情况下，您可以清除 Windows Defender 保护历史记录^{(clear the Windows Defender Protection History)}，看看是否有帮助。

您可以通过访问此处的文件来删除它们：

C:\ProgramData\Microsoft\Windows Defender\Scans\History\Service

希望这可以帮助！

相关阅读^{(Related read)}：如何删除不会消失的 Windows Defender Action Needed 或 Recommended 通知。

Windows Defender repeatedly identifies same threat even after removal

Some Windows 11/10 PС users are reporting the issue whereby Windows Defender repeatedly identifies the same threat even after running a full system antivirus scan and consequently quarantined/removed the malware in question.

If you’re faced with this issue, you can try our recommended solutions below in no particular order and see if that helps to resolve the issue.

Clear browser cache
Run AV scan using third-party tools
Add Scans History folder to Microsoft Defender exclusion list
Clear Windows Defender Protection History.

Let’s take a look at the description of the process involved concerning each of the listed solutions.

1] Clear browser cache

If you have had malware infection some time ago on the system, which was removed, but the web browser’s settings still remain unchanged, Windows Defender may be flagging suspicious browser-based behavior this way. In this case, check your browser for potentially dangerous extensions. If you cannot find any suspicious extensions, add-ons, or other browser-based content, try to clear the browser cache.

2] Run AV scan using third-party tools

The error could be the detection is a false positive, meaning that there’s no malware on your computer. Nevertheless, it’s advisable to run an AV scan using any reputable on-demand standalone antivirus software – as well as run a Windows Defender Boot-Time scan as additional measures.

3] Add Scans History folder to Windows Defender Exclusion list

Windows Defender stores logs of the scan results, quarantined items, and removed threats. Consequently, when you perform a full system scan, the tool may be scanning itself and detect its logs as a potential threat. In this case, you can add the scans history folder to the Windows Defender exclusion list – when you have clicked the + Add an exclusion button and selected Folder from the drop-down, copy and paste the directory path below into the Folder bar in the Select Folder window, and hit Enter.

C:\ProgramData\Microsoft\Windows Defender\Scans\History

Click Yes on the UAC prompt.

If this doesn’t fix the issue, try the next solution.

4] Clear Windows Defender Protection History

Similar to the above, but in this case, you can clear the Windows Defender Protection History and see if that helps.

You can delete them by accessing the files here:

C:\ProgramData\Microsoft\Windows Defender\Scans\History\Service

Hope this helps!

Related read: How to remove Windows Defender Action Needed or Recommended notification that won’t go away.

刚朱

About the author

我是一位经验丰富的软件工程师，在 Windows Phone 和 Office Space 行业拥有超过 10 年的经验。我的技能包括使用传统的文本和图像格式，以及为最新的移动设备进行开发。我在提供优质服务方面有着良好的记录，并且我总是愿意帮助他人实现他们的目标。

即使在移除后，Windows Defender 也会反复识别相同的威胁

即使在移除后，Windows Defender也会反复识别相同的威胁^(Defender)

1]清除浏览器缓存

2]使用第三方工具运行 AV扫描^{(Run AV)}

3]将扫描^{(Add Scans)} 历史^(History)文件夹添加到Windows Defender排除^{(Windows Defender Exclusion)}列表

4]清除Windows Defender保护历史^{(Windows Defender Protection History)}

Windows Defender repeatedly identifies same threat even after removal