可以在 Word、PowerPoint 和 Excel 中查看有关数字签名或用于创建数字签名的证书的信息。 有关如何添加或删除数字签名的详细信息，请参阅 添加或删除数字签名。 有关在文件中添加或删除保护（如密码、受限编辑和数字签名）的常规信息，请参阅在 文档、工作簿或演示文稿中添加或删除保护。 查看 ...

联系 Microsoft 支持人员。查找常见问题的解决方案，或从支持专员那里获取帮助。

Things to try when we’re not able to save your payment info on Xbox 360.

XBOX Support offers help for XBOX, Game Pass, and billing questions. Get advice and customer service in the XBOX Support community.

Alpha Skip-Ahead Ring (2610.260819-2200) Hey XBOX Insiders! We are releasing a new XBOX Update Preview to the Alpha Skip-Ahead ring today. Continue reading below to learn all about what's included with this update.

Improvements and fixes The following summary outlines key issues addressed by this update. The bold text within the brackets indicates the item or area of the change. [Security] This update addresses a security vulnerability. To deliver these improvements, the update is offered as a standalone security update. For more details, see CVE-2026-6726 and CVE-2026-66804. Note This hotpatch update ...

If you see error E105 when you try to turn on your XBOX console, this means there may have been a problem installing an update. Find more solutions here.

Learn how to add security information to protect your Microsoft account.

Learn about error code E68 and what to do if you see it when you use an XBOX 360 console.

Learn how to check your Xbox Live download history on your Xbox 360 console or computer. Also find out how to redownload content.