Use your Microsoft account to sign in to Microsoft services like Windows, Microsoft 365, OneDrive, Skype, Outlook, and Xbox Live.

Learn how to get more storage or delete excess files if your OneDrive is full or near your storage limit.

Windows 设备可能会在不同时间获得新功能，因为 Microsoft 通过多种服务技术提供非安全更新、修补程序、改进和增强功能，包括受控功能推出 (CFR)。 如果你需要重启设备来完成更新，Windows 会通知你，你可以选择最适合你完成更新的时间。

Important: We recommend that you watch the video below and review the guidance for filling out the recovery form before trying the form again.. If you are unable to use the account recovery form because you don't recognize the additional account security information, use our Sign-In Helper.. To protect your account and its contents, our support agents and advocates are not allowed to send ...

Microsoft added OAuth support for Yahoo! accounts in the Windows 10 Creators update. To install the Creators Update now, go to the software download site, and select Update now.For more information about Windows updates, see Get the latest Windows update.. If you have a Japanese Yahoo! email account, you'll need to do the following:

Note: In earlier versions of Outlook, IMAP accounts also used an Outlook Data File (.pst).In Outlook 2016 and Outlook for Microsoft 365, IMAP accounts use Offline Outlook Data Files (.ost). You can also use an Outlook Data File (.pst) to backup or export items from any type of email account.

1. Sign in with your Microsoft account. You will be prompted to Sign in with Microsoft account. If you have an existing Microsoft account on your mobile device then you will be asked to confirm your account, then click Continue.. If you don't have an existing Microsoft account on your mobile device then you will be asked to sign into your account or create a new one, then click Continue.

Tip: If your can't get the code by email or phone, you might be able to enter an email address that's different from the one you're trying to recover. Go to the Recover your account page and follow the prompts.

準備安裝了嗎？ 開始之前，請確定您的PC或Mac符合 系統需求。. 如果您已兌換產品密鑰，只要重新安裝應用程式，或是知道您已透過公司或學校指派授權，您可以跳到登入以 下載並安裝 Microsoft 365 或 Office 一節。 不過，如果這是您 第一次 安裝 Microsoft 365或 Office，您可能需要先執行一些步驟。

如果显示此屏幕，则会安装 Microsoft 365 家庭版 的试用版或 Office 的非订阅版本的试用版。 如果你登录到 Microsoft 365 或非订阅版本的 Office，该版本已预安装在新设备上，但没有与你的帐户关联的Microsoft 365 产品或非订阅版本的 Office，你将看到此屏幕。