After upgrade to Windows 10 there is no Internet connection in the virtual machine.
Red cross sign in system tray.
Possible interference from installed antivirus software.
- Right-click on Start > Control Panel > Programs and Features > Uninstall or change a program.
- Locate and uninstall any antivirus software.
- Restart the virtual machine and check the issue.
- After the restart the antivirus software can be installed again.