Many tasks for Office products don't require a product key because your Microsoft account takes care of them instead.

2. Install any applicable firmware updates. If you have a Surface device, see Security issue for TPM on Surface devices for more information and instructions.. If your device is not from Microsoft, locate the device manufacturer of your device in the following table, select the corresponding link, and apply the firmware update that's provide.

Get productive quickly with Microsoft 365 videos and tutorials. Explore Microsoft 365 training guides and tips to collaborate with anyone, anywhere.

A list of Excel training, from entry level to advanced skills, plus templates and other resources.

Learn how to format text, add graphics, and more in Word documents. Create professional-looking documents with ease using our step-by-step guide. Try it now!

With PowerPoint for the web you create presentations right in your browser. Create and save your presentations in your OneDrive, and edit and share them online.

We've made it easier to keep Windows current with the latest features and improvements—and with fewer interruptions and restarts when you're using your PC the most.

如果你的 Xbox 主机或配件不再符合标准有限保修的资格，则可能有资格享受免费保修服务。下表按设备类型概述已过保修期的服务费用。超出保修期的收费包括适用的税费（加拿大、印度和美国除外）。

Training: Learn how to create a shareable link to make it easy to share files in a document, email, or IM.

Note: If it’s been fewer than 10 days since you upgraded to Windows 10, your previous version of Windows will be listed as a system file you can delete.If you need to free up drive space, you can delete it, but keep in mind that you'll be deleting your Windows.old folder, which contains files that give you the option to go back to your previous version of Windows.