Why did desktop rotation stop working in Windows 7?

Question

Windows

Hello connoisseurs!
On a Windows 7 laptop, I used to use the Ctrl + Alt + arrow keys to rotate the desktop. Then, somehow suddenly, this method stopped working.
What can be wrong? How to fix?
There is a suspicion that this could be affected by connecting an external monitor, which I began to use sometimes, but I'm not sure about this.

Answer 1

this keyboard shortcut is used in the settings of the Intel video card driver. some time ago in new drivers they disabled this feature by default, enable it manually.

Answer 2

This is not done by Windows, but by the video driver (or some utility from the beech manufacturer or a third-party program in general), check the hot keys in the control panel - they are enabled and assigned correctly.