了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。 通过检查管理员上方是否显示电子邮件地址，确认管理员帐户也是你的 Microsoft 帐户。 如果显示了电子邮件地址，则这是 Microsoft 帐户。

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

了解如何排查 Windows 中的文件资源管理器问题。 若要在Windows 10中打开文件资源管理器，请选择任务栏上的图标，按键盘上的 Windows 徽标键 + E，或选择用户图标) 正下方的“开始 > 文档 (”。 如果无法打开文件资源管理器，下面是一些可以尝试的方法。

To pin Quick Assist to your taskbar so you can quickly get back to it, after Quick Assist is open, right-click (or press and hold) the icon on your taskbar > Pin to taskbar. If the old app icon still appears on your device, make sure you select the new app icon.

但如果需要测试多个条件，例如我们假设所有条件都需要为 True 或 False (AND)，或只有一个条件需要为 True 或 False (OR)，或者如果想要检查某个条件是否不 (NOT) 符合你的条件，这时该怎么做呢？这三个函数均可以单独使用，但它们更常见于与 IF 函数成对

了解如何从 Microsoft 365 商业版订阅下载和安装所需的应用。 提示 登录可将应用连接到 Microsoft 365 的其余部分，使你能够将文件保存到云、与他人共享文件，并在工作时自动保存文档。

Step 2: Back up your folders. Windows Backup is an easy, single stop for all of your backup needs. Your free Microsoft account comes with 5 GB of OneDrive cloud storage (and more storage is available if you need it), and backing up your folders syncs the folders you specify to your OneDrive account, making them instantly accessible on all computers that you use with this Microsoft account.

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

Note: If you signed in with a Microsoft account such as an Outlook.com, Hotmail, Live, or MSN email account instead of your work or school account, sign out, and then sign in again using the correct account. Not sure which account you're signed in with? Select Account manager in the Outlook navigation header. If you're not signed in with the account you want, select Sign out and start the ...

Change two-step verification settings; Common problems with two-step verification for work or school accounts; Manage app passwords for two-step verification