Hi @panxinxin,
Can you tell us which spacedesk version did you install/uninstall?
Is your primary machine monitor still displaying properly after spacedesk uninstall and before restarting it?
Can you try to boot your machine in safe mode?
For assistance, please refer to this link https://www.drivereasy.com/knowledge/how-to-enter-safe-mode-in-windows-10/#why
