PC screen not projected on my 2nd monitor screen

[Doxy75]

Hi guys,

I bought an HP monitor to use as a 2nd monitor with my work PC, which is also an HP. But my PC screen does not project on my 2nd monitor and I don't understand why.
Yet, it works fine with my home computer, but not with my work one. Is it necessary to set up the PC in a certain way?
For your information, I use a dock between the two screens (My 2nd screen is HDMI and my PC is USB-C).
What could I do to make it work?
Thank you for your answers

[itsmyname]

@Doxy75 -- when you open the Windows "Device Manager", and expand the "Monitors" and/or the "Display Adapters" branches of the device "tree", do you see anything more than one device in each branch, to indicate that Windows has detected the second screen?

[Doxy75]

Thanks for your answer,
No, it seems that my business PC does not recognize the 2nd screen.
I don't understand why, because my personal PC recognizes the 2nd screen perfectly...

[itsmyname]

@Doxy75 -- my business PC does not recognize the 2nd screen

Is that PC supplied by your employer's I.T. Department? It could be "locked-down" by Windows "Group Policy" to prevent any non-authorized changes, such as not allowing USB memory-sticks to be connected, for any unauthorized "export" of the company's data, or to add an external monitor.