BitLocker 是 Windows 加密技术，它通过加密驱动器并要求一个或多个身份验证因素才能解锁驱动器来保护数据免受未经授权的访问。 Windows 在检测到可能未经授权的访问数据尝试时，需要 BitLocker 恢复密钥。 此额外步骤是一种安全预防措施，旨在确保数据的安全。

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

The new Microsoft Edge is based on Chromium and was released on January 15, 2020. It is compatible with all supported versions of Windows, and macOS. With speed, performance, best in class compatibility for websites and extensions, and built-in privacy and security features, it's the only browser you'll ever need.

To reset your PC, go to Start > Settings > System > Recovery .Next to Reset this PC , select Reset PC.Then, select Keep my files, choose cloud or local, change your settings, and set Restore preinstalled apps? to No.. Open Recovery settings

Use System restore to make restore points when you install a new app, driver, or Windows update, and when you create a restore point manually.

In the search box on the taskbar, type device manager, then select Device Manager from the menu.

If you don't have a desktop PC and the slider doesn't appear or work, try updating the display driver. Select Search on the taskbar, type Device Manager, and then select Device Manager from the list of results.In Device Manager, select Display adapters, then select the display adapter.Press and hold (or right-click) the display adapter name, then select Update driver and follow the instructions.

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.

You can always ask an expert in the Excel Tech Community or get support in Communities. Learn how to use nested functions in a formula. IF function. AND function. OR function. NOT function. Overview of formulas in Excel. How to avoid broken formulas. Detect errors in formulas. Keyboard shortcuts in Excel. Logical functions (reference) Excel ...

On a Mac? See Check for Office for Mac updates automatically.. Click here for the Latest updates for versions of Office that use Windows Installer (MSI).. Choose your version of Office. If you're not sure what version of Office you have, see What version of Office am I using?. Not sure which type of install you have?