[2020] cant switch to fullscreen in siege

Hello PIat1, thank you for getting in contact with us, this issue was previously reported fixed in the last fe days with the latest Y4S3.2 patch.

As mowhi suggested please start by updating your graphics driver and windows driver, I know Nvidia just released an update in the last few days if that is the GPU driver you are currently using.

Have you tried deleting your config file ans starting with the default settings? You can locate your file in this location by default -
\My Documents\My Games\Rainbowsix - Siege\*your Uplay ID number*\Gamesettings.ini

Hi PIat1! I'm sorry to hear about this. Thank you for letting me know what you've tried to get this resolved! Since you noticed this after updating your driver, have you tried rolling it back to the previous version? I understand this is not an ideal permanent solution, but it would at least be beneficial to try to see if you notice any differences!