How are you connecting to the monitor from your device/motherboard? HDMI cable? Get a better hdmi cable.
What is the model number of your device/motherboard?
What version of WIndows 10? 1909?
Yeah, the current acer intel driver is clearly not compatible, I had the exact same problem on my e5-576g. I was able to get the official intel driver to install via the device manager.
He is talking about a Medion laptop and Acer monitor, not an Acer laptop.
For laptops, the "official" driver is the one provided by the laptop manufacturer. Yes, you can use the device manager and force a driver install. But, not using the manufacturer supplied driver will cause you to lose customizations/modifications. And, if you have dual graphics, you will create problems by not using BOTH drivers from the manufacturer.