See how to view the details for signatures and certificates.

You see the following error code and message when you launch a game or an app on your Xbox console: 0x803f8001

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Get an error message or error code when making a purchase on Xbox? Find out what they mean.

Find out how to submit a request for a refund for a purchase of digital Xbox content.

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...

Learn how to redeem a Microsoft/Xbox gift card or other code on your mobile device, Windows device, or Xbox console.

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手写签名可让你的文档具有个人风格。 你可以扫描你的签名，将其存储为图片，然后在 Word 文档中插入签名。 扫描手写签名并插入手写签名的图片 在纸张上写下您的签名。 扫描该页面并以常见的文件格式将其保存在计算机上：.bmp、.gif、.jpg 或 .png。

If you see error code 0x87e00196, you'll need to reinstall your Gaming Services package. Find out how here.