How do I know someone can't remote access my computer?

Episode 1366 (2:03:08)

Evangeline from Virginia Beach VA
Windows Start Menu

Evangeline has a hand me down laptop and she wants to know if there's a way for someone to access it without her permission. Leo says it's conceivable if they know her IP address and the password for the administrator account, which is highly unlikely. Leo says to change the Admin password. She can also go into the settings and disable remote access.

She may want to just format and reinstall Windows. She can just press the Windows key and type "recovery" to get to it. She should make sure to back up her data first. Wiping the computer and reinstalling Windows is the only way she can be sure no one has anything installed on her computer.