桌面pdf文档无法打开

Windows 8 opens many types of files in the Windows 8 interface formerly known as Metro by default. If you’re at the desktop and double-click many types of media files, you’ll see a full-screen media viewer.

Windows 8默认在Windows 8界面中打开以前称为Metro的Windows中的许多类型的文件。 如果您在桌面上并双击多种类型的媒体文件，则会看到全屏媒体查看器。

You can easily prevent these media files from opening in the full-screen Windows 8 apps when you double-click them. All you have to do is change your default programs.

双击它们可以轻松阻止这些媒体文件在全屏Windows 8应用程序中打开。 您要做的就是更改默认程序。

将桌面应用程序设置为默认程序 (Set Desktop Applications As Your Default Programs)

You can change these settings from the Default Programs window. To open it, press the Windows key, type Default, and press Enter.

您可以从“默认程序”窗口中更改这些设置。 要打开它，请按Windows键，键入Default，然后按Enter。

Click the Set your default programs link in the window that appears.

在出现的窗口中，单击“ 设置默认程序”链接。

Scroll down in the list, select the Windows Photo Viewer, and click the Set this program as default option. This will make photos and other image files open in the Windows Photo Viewer application on your desktop. Windows won’t use the full-screen Photos app anymore.

在列表中向下滚动，选择Windows Photo Viewer，然后单击“ 将此程序设置为默认值”选项。 这将使照片和其他图像文件在桌面上的Windows Photo Viewer应用程序中打开。 Windows将不再使用全屏的“照片”应用程序。

Next, select the Windows Media Player application and click Set this program as default. This will make music and video files open in Windows Media Player on the desktop, not in the full-screen Music and Videos apps.

接下来，选择Windows Media Player应用程序，然后单击将程序设置为默认 。 这将使音乐和视频文件在桌面上的Windows Media Player中打开，而不是在全屏音乐和视频应用程序中打开。

PDF documents are the last type of file that will open in full-screen mode by default. PDFs open in Reader, Microsoft’s included PDF-viewing application, by default. Unfortunately, Microsoft hasn’t included a desktop application that can read PDFs. You’ll need to download an alternative PDF reader such as ,  , or even .

PDF文档是默认情况下将以全屏模式打开的最后一种文件类型。 默认情况下，PDF在Reader(Microsoft随附的PDF查看应用程序)中打开。 不幸的是，Microsoft尚未包含可以读取PDF的桌面应用程序。 您需要下载其他PDF阅读器，例如 ， 甚至 。

After installing another PDF reader, you can select it when opening a PDF file to make it your default PDF viewer.

安装另一个PDF阅读器后，您可以在打开PDF文件时将其选择为默认的PDF查看器。

While we’ve covered setting Windows Photo Viewer and Windows Media Player as the default applications here, you can also install and use other applications – such as for media files or for images — and set them as your default application, just as you could on earlier versions of Windows.

虽然我们在这里介绍了将Windows Photo Viewer和Windows Media Player设置为默认应用程序，但是您也可以安装和使用其他应用程序(例如， 用于媒体文件或用于图像)，并将它们设置为默认应用程序，就像您可以在Windows的早期版本中使用。

(However, if you’re using Windows RT on an ARM device, you won’t be able to install any third-party desktop applications.)

(但是，如果在ARM设备上使用Windows RT，则将无法安装任何第三方桌面应用程序。)

更改单个文件关联 (Changing Individual File Associations)

To make only a specific file type open in a desktop application, you can right-click a file of that type in Windows Explorer, point to Open with, and select Choose default program. This will only affect the selected file extension – for example, if you set PNG images to always open in Windows Photo Viewer, JPEG images will still open in the Photos app.

要仅在桌面应用程序中打开特定文件类型，可以在Windows资源管理器中右键单击该类型的文件，指向“ 打开方式” ，然后选择“选择默认程序” 。 这只会影响所选的文件扩展名-例如，如果将PNG图像设置为始终在Windows Photo Viewer中打开，则JPEG图像仍将在“照片”应用程序中打开。

Note that, if you’re using an application in the new Windows 8 user interface and you open a file of one of these types, it will now open in the your selected desktop application. Windows 8’s new interface and the desktop share the same file associations, so you can’t have separate file associations for each environment.

请注意，如果您在新的Windows 8用户界面中使用应用程序，并且打开了其中一种类型的文件，则该文件现在将在所选的桌面应用程序中打开。 Windows 8的新界面和桌面共享相同的文件关联，因此对于每种环境，您不能有单独的文件关联。

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桌面pdf文档无法打开