Solved! Problem in Multi external monitors

Jan 10, 2019
I connected 2 screens by my laptop (byVGA and HDMI)
Control panel is showing all the screens but I am not being able to use all three of them as one extended display.. in all cases one of the screens set to non functional.. (all three screens are working though but not simultaneously in any case)
*****it's a really old laptop with HDMI and VGA ports which I used and runs on an Intel core 2 duo
The integrated graphics of Core2 Duo is only capable of supporting two monitors. You will need a usb graphics adapter to add a 3rd but these are only good for business graphics.