Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Click Accessories, right-click Command Prompt, and select Run as administrator. If you are prompted for an administrator password or for confirmation, type the password or provide confirmation.

查找有关 Windows 操作系统的帮助和操作方法文章。 获取对 Windows 的支持，并了解安装、更新、隐私、安全等方面的信息。

Important System corruption can sometimes spread to external storage devices, so unplug any external storage (such as external hard drives) before performing a system reset and leave such devices unplugged until you’re able to verify whether the issue is still occurring after the reset.

Review the record of the steps you followed to make sure it shows what you want it to show. Select Save, name the .zip file, choose where to save it, and then select Save.Now you can attach and send this .zip file to the person helping you troubleshoot the problem on your PC.

For volume license versions of Project or Visio, use the Office Deployment Tool (ODT) to install a Click-to-Run version. If you have a volume license for Project 2016 or Visio 2016 and you’re trying to install the Click-to-Run version of Microsoft 365 Apps for enterprise, you can use the Office Deployment Tool to download and install the Click-to-Run perpetual (stand-alone) versions of ...

App & browser control in Windows Security provides the settings for Microsoft Defender SmartScreen, which helps protect your device from potentially dangerous apps, files, websites, and downloads.

如果扫描仪已打开并连接到网络，Windows 应该能够自动发现它。 可用扫描仪可以包含网络上的所有扫描仪，例如蓝牙和无线扫描仪或者插入另一台设备和在网络上共享的扫描仪。

Cause. The device has no drivers installed on your computer, or the drivers are configured incorrectly. Recommended Resolution. Update the Driver. In the device's Properties dialog box, click the Driver tab, and then click Update Driver to start the Hardware Update Wizard.Follow the instructions to update the driver.

To reset the Hosts file back to the default, follow these steps: 1. Open Notepad. To do this, search for “Notepad” using Cortana, and then tap or click the Notepad icon.. 2. Copy the following text, and then paste the text into the file: