Hi, I'm John! I will help you with this.
To help narrow down the issue:
- Are you using a laptop touchpad, a USB mouse, or a wireless mouse?
- Does the cursor disappear only after Windows starts, or is it missing even on the sign-in screen?
- Is the mouse cursor missing in all areas of the screen, or only in specific apps or windows?
- Have you recently installed any Windows updates, drivers, or software before this started?
In the meantime, try pressing Ctrl + Alt + Delete and see if the cursor appears on that screen.
If you're using a laptop, also try pressing the key combination that enables/disables the touchpad (often Fn + one of the F-keys with a touchpad icon).
If the issue persists, please provide more details by answering my questions.
Click "Add comment" below to let me know.