Monitor issue, .... Need a help!

Hello:

Windows 7 with I.E. 11

I used an old flat monitor, 'Generic Non-PnP Monitor' when I started using a refurbished but fast running PC with Win 7/I.E. 11 without any issues attached.



Two days ago, I changed the monitor to an old but in excellent working-conditioned CRT monitor, 'Acer ACT713' with more sharp images in which I prefer. However, whenever I shut-down for more than an hour and starts PC up again, it throws back to 'Generic Non-PnP Monitor,' even though there is 'Acer ACT713' running.



In order to make a correct monitor/Acer ACT713, I need to access, 'Display < Change Display Setting.'



My question is;

How to stabilize an rightful Monitor permanently?



Any help would be trully appreciated.



Thanks,

Monitor issue, .... Need a help!