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

Troubleshoot problems with Bluetooth accessories. If you can turn on Bluetooth but having problems pairing or using a Bluetooth accessory, try the following steps to try to fix common problems with Bluetooth accessories.

根据获取Windows 10或Windows 11副本的方式，需要 25 个字符的产品密钥或数字许可证才能激活它。 Windows 10版本 1511) 中称为数字权利的数字许可证 (是Windows 10和Windows 11中无需输入产品密钥的激活方法。 如果二者都不具备，则无法激活你的设备。

Where can I find my BitLocker recovery key? BitLocker likely ensured that a recovery key was safely backed up prior to activating protection. There are several places that your recovery key may be, depending on the choice that was made when activating BitLocker:

Next to the password you want to change, select More actions , and then select Edit.

Do one of the following: If you've never used Easy Connect, select Use Easy Connect.. If you've used Easy Connect before, select your helper’s contact name. To invite someone who isn't on your contact list, select Invite someone to help you.

Learn how to access the Control Panel in Windows for managing your system settings and programs.

购买新电脑. 如何知道现在是使用新电脑的时候了. 帮助我选择新的Windows 11电脑. 帮助我选择 Microsoft 设计的笔记本电脑 ...

Learn how to update Windows to ensure your device operates smoothly and securely with the latest features.

Before you begin. Driver updates for Windows, along with many devices, such as network adapters, monitors, printers, and video cards, are automatically downloaded and installed through Windows Update.