如果您的计算机上有一个文件可能是从 Internet 下载或从其他计算机复​​制的，那么当您尝试打开它时，您可能会收到警告。Windows 已阻止访问此文件^{(Windows has blocked access to this file)}。

如果您看到它的属性，您可能会看到显示的消息：

此文件来自另一台计算机，可能会被阻止以帮助保护这台计算机

1]取消阻止文件

如果要打开该文件，则必须右键单击该文件并打开“属性”。

在“常规^(General)”选项卡的底部，您将看到归类为“安全性：此文件来自另一台计算机，可能会被阻止以帮助保护这台计算机”^{(This file came from another computer and might be blocked to help protect this computer)}。

点击取消阻止^(Unblock)。单击应用 > 确定。

这应该可以帮助您打开文件。^{(This should help you open the file.)}

附件管理器^{(Attachment Manager)}通过识别文件类型和相应的安全设置来保护您免受不安全的附件和下载的影响。当外部文件下载/复制到机器时，Windows会附加一个区域标识符^{(Zone Identifier)}。如果它识别出可能不安全的附件，它会阻止您打开文件，或者在您打开文件之前发出警告。如果您愿意，您可以更改其严重性。

尽管我们不建议这样做，但您也可以通过更改组策略^{(Group Policy)}或注册表^(Registry)设置来阻止Windows 10检查或阻止此类文件。

这篇文章展示了如何使用组策略^{(Group Policy)}或注册表编辑器^{(Registry Editor)}在附件管理器^{(Attachment Manager)}中配置高风险、中风险、低风险文件。下面简要介绍了它们。

2]更改组策略设置

运行gpedit.msc并导航到以下设置：

User Configuration > Administrative Templates > Windows Components > Attachment Manager

将不保留文件附件中的区域信息^{(Do not preserve zone information in file attachments)}设置更改为已启用^(Enabled)。

保存并退出。

3]调整注册表

运行regedit并导航到以下键：

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies

右键单击Policies > New > Key并将其命名为Attachments。

现在在右窗格中，右键单击空白区域> New > DWORD。

将其命名为SaveZoneInformation并将其值设为1。

重启你的电脑。

当文件被阻止时，您可能会看到类似的消息：^{(Similar messages you may see when a file is blocked are:)}

• Microsoft Defender SmartScreen 阻止了无法识别的应用程序启动
• Windows 发现此文件可能有害。为帮助保护您的计算机，Windows已阻止访问此文件。

This file came from another computer and might be blocked on Windows

If you have a file оn your computer that may have been downlоaded from the internet or copied from some other computer, then when you try tо open it, you may receive a wаrning. Windows has blocked access to this file.

If you see its Properties, you may see a message displayed:

This file came from another computer and might be blocked to help protect this computer

1] Unblock the file

If you wish to open the file, you will have to right-click on the file and open Properties.

Under the General tab, towards the bottom you will see classified under Security: This file came from another computer and might be blocked to help protect this computer.

Click on Unblock. Click Apply > OK.

This should help you open the file.

The Attachment Manager protects you against unsafe attachments and downloads by identifying the file type and the respective security settings. When an external file is downloaded/copied to the machine, Windows attaches a Zone Identifier. If it identifies an attachment that might be unsafe, it prevents you from opening the file, or it warns you before you open the file. If you wish, you can change its severity.

Although we do not recommend it, you can also stop Windows 10 from checking or blocking such files by changing a Group Policy or Registry setting.

This post shows how to configure High risk, Medium risk, Low-risk files in the Attachment Manager using Group Policy or Registry Editor. They have been touched upon in brief, below.

2] Change Group Policy setting

Run gpedit.msc and navigate to the following setting:

User Configuration > Administrative Templates > Windows Components > Attachment Manager

Change the Do not preserve zone information in file attachments setting to Enabled.

Save and exit.

3]  Tweak the Registry

Run regedit and navigate to the following key:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies

Right-click on Policies > New > Key and name it as Attachments.

Now in the right pane, right-click on an empty space > New > DWORD.

Name it as SaveZoneInformation and give it value of 1.

Restart your computer.

Similar messages you may see when a file is blocked are:

• Microsoft Defender SmartScreen prevented an unrecognized app from starting
• Windows found that this file is potentially harmful. To help protect your computer, Windows has blocked access to this file.

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