Hi @kenji6,
Welcome to the Roku Community!
We understand that you're having a problem casting your Windows 11 laptop through your Roku, help is here.
Please try the follow these steps:
- Press Home on your Roku remote
- Select Settings
- Select System
- Select Screen mirroring
- After you open the screen mirroring settings, choose a setting to adjust and connect.
Please check out this support article on how to connect using screen mirroring.: How to screen mirror your Android™ or Windows® phone to your Roku® streaming device
Let us know if it works, keep us posted.
Best regards,
Arvy
Marc
Roku Community Moderator