All monitors are plug-and-play, the absence of a monitor driver should not affect monitor functionality at all, indeed thousands of Windows users don't even bother with monitor manufacturer's driver, they just leave the default generic driver.
And many monitors don't even have a manufacturer's driver available, as they aren't required for the monitor to work properly.
Explain what you mean by "generic driver doesn't work".
If there is a driver for that monitor, it will be on Acer's support page for that model:
http://www.asus.com/ae-en/Commercial-Monitors/VH236H/HelpDesk_Download/
It seems they only have the "MultiFrame" software which is for split-screen, multi-window management.
It's not a monitor driver, they don't seem to have released one for that model.