VirtualBox and vagrant are installed in the win10 system, but the virtual machine cannot be started when it is started later. The error code “VirtualBox host only Ethernet adapter” appears

Solution:

In the control panel = => network and Internet = => network and sharing center = => change adapter settings = => there is a VirtualBox host only Ethernet adapter inside. After finding it, disable it first, and then right-click the properties to find the VirtualBox ndis6 bridged networking driver, uncheck it, highlight it, enable it again, check it, and then exit.