What if I can't find the recovery key? If your device is managed by an organization, check with your IT department to retrieve the recovery key. If you can’t find the BitLocker recovery key and are unable to undo any changes that caused it to be needed, you’ll have to reset your device using one of the Windows recovery options. Resetting your device will remove all of your files.

当 BitLocker 无法在 Windows 中自动解锁加密驱动器时，需要 BitLocker 恢复密钥。 此密钥是一个 48 位数字，用于重新获得对驱动器的访问权限。

You can reduce the file size and save disk space by compressing pictures in your document. The compression options reduce both the file size and picture dimensions based on how you intend to use the picture, such as viewing on screen or in an email message. You can compress all pictures in the file or just the ones that you select. These features aren't available in Microsoft 365 for the web ...

Learn how to use Snipping Tool to capture a screenshot, or snip, of any object on your screen, and then annotate, save, or share the image.

重要: Microsoft Lens 应用将从 2025 年 9 月 15 日起从 Android 设备停用。 11 月 15 日之后，将不再支持 Microsoft Lens。 了解如何使用Microsoft 365 Copilot 应用 作为替代方法。

チャット中に、ファイル、画像、リンクを含むメッセージを送信できます。 リンクを送信する リンクを送信するには、メッセージ ボックスの下から [の書式設定 ] を選択します。 次に、メッセージ ボックスの上部にある [リンク の 挿入 ] を選択します。 表示テキストとアドレスを追加し ...

Send large files by using file sharing, cloud services, or other solutions for working around file size limits in Outlook.

The compression options in Microsoft Picture Manager reduce both file size and picture dimensions based on how you intend to use the picture, such as in Web pages or e-mail messages. Select the picture you want to compress. Click the Picture Tools Format tab, and then click Compress Pictures. Do one of the following: To compress your pictures for insertion into a document, under Resolution ...

如果尝试附加大于最大大小限制的文件，将收到错误消息。 有几种方法可以解决此大小限制，包括使用文件共享服务或压缩文件。 Outlook 会限制可发送的文件的大小。 此限制可防止计算机持续尝试上传超出大多数 Internet 服务提供商限制的非常大的附件。 对于 Outlook.com 或 Gmail 等 Internet 电子邮件 ...

Learn how to install Office 2021, 2019, or 2016 on your PC or Mac.