Summary A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This is a 48‑digit number that lets you regain access to your drive.

Support for Office 2021 will end on October 13, 2026. Learn more about your options for Office.

Find everything you need to manage your Microsoft account, XBOX profile, and more.

All but the original XBOX Wireless Controller can take updates wirelessly without connecting with a USB cable. This controller has a small, circular 3.5-mm port on the bottom of the controller (if your controller has this port, you can only update via USB cable).

激活是一个技术过程，用于将产品密钥或数字权利与设备的硬件配置配对。 这不评估副本本身的真实性，也不保证 Windows 副本是 正版 的。 它只确保产品密钥或数字权利对硬件配置有效。 另一方面，验证是检查关键 Windows 许可文件是否未被损坏、删除或删除，以及是否必须接收某些更新和下载的 ...

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

Windows 11 Windows 10 Before starting, make sure that the Windows 11 device supports Bluetooth. For more info on how to check, see Fix Bluetooth problems in Windows. For help with adding non-Bluetooth devices, see Add a hardware device to a Windows device.

Install Bluetooth drivers using Windows Update Select Start > Settings > Windows Update. Select Check for updates. Install any available updates, and then restart your PC. Reinstall the Bluetooth driver If updating the driver doesn’t help, try uninstalling and reinstalling it. Open Device Manager. Expand Bluetooth. Select and hold (or right‑click) your Bluetooth adapter, then select ...

Learn how to use Snipping Tool to capture a screenshot, or snip, of any object on your screen, and then annotate, save, or share the image.

Manage app permissions for a camera in Windows. Note Camera privacy settings for desktop apps can't be changed at an individual desktop app level. Desktop apps include apps installed from the internet, a USB drive, or apps installed by an IT administrator. Internet browsers, like Microsoft Edge, and video conferencing apps, like Microsoft Teams, are desktop apps that need this setting turned on.