Lost screen resolution 1920x1080

[chevalasco]

Hi, after last Microsoft patch update (jan 2018) on my virtualized Windows 10 Pro 64 bit build 16299, I'm unable to run at maximum resolution. If I look at the virtualized graphic card properties I can see that the maximum res is 1400 x 1050 16.8 M colors, 32 bit (that is, of course, what Windoww uses). If anyone has the solution for this problem, please answer. I'm an experienced user, so it's useless to post the well known reccomandations to press Ctrl+F or to install the last Guest Additions because that does NOT resolve this issue. Thank you.