Can someone access my other devices if they duplicated my laptop screen?

I’d suggest booting from a Linux recovery USB to back up any important information and then do a complete wipe and reinstall of the OS. You don't want to risk any hidden malware that might still be lingering.

No, just duplicating the screen won't give them access to your other devices. The remote software was used to lock down your parent's controls, but once that session ended, any access they had would end too.

Duplicating the screen itself doesn’t pose a threat. What he likely did was install software to have ongoing access and capture keystrokes. I’d recommend reimaging the computer to factory settings immediately and remind your parents to be cautious about granting access to their PC. Never trust anyone who calls unless you initiated the contact.

If you're unsure about what the scammer did, it's best to do a complete wipe of the system. Disconnect the computer from the internet first. They could have been checking for saved passwords or even putting something on the machine to keep accessing it after they’re gone. Make sure to change all important passwords immediately from a safe device.

It’s like this: don’t give a stranger the keys to your house, right? Treat your devices the same way! Even if they just duplicated the screen, there's a risk they could have installed something that lets them see your sensitive info later.