Hello,Another solution that worked for me is to remove or change the '.desktop' extension of the following file:
/usr/share/gdm/autostart/LoginWindow/orca-screen-reader.desktop
To do so,open a terminal (right-clic on the desktop -> clic 'Open in terminal') and type in
cd /usr/share/gdm/autostart/LoginWindow
sudo mv orca-screen-reader.desktop orca-screen-reader.desktop.bkp
then type your password when asked for.
