Windows 10: monitor not detected

In Windows 7, I was using extended display:
primary=notebook screen
secondary=external monitor

Ater installing Windows 10, the primary screen is not detected by the system; only the external monitor works.

In "System > Display" it says "didn't detect another display".

The primary screen works only a few seconds while starting the pc, than it goes black and dead right before Windows logon screen.

Already updated/installed/resinstalled/disabled/enabled drivers, but nothing worked.

:)

 

Dual Monitor set-up: 2nd monitor not being detected

I have a dual monitor system. The second monitor is NOT being detected in my settings. I have tried to resolve this issue by restarting, altering properties, and ensuring the drive is up-to-date (all to no avail). Any suggestions?

(My monitors are not the same type - one is an HP LE1901wi, the other is HP L1901, if this makes any difference).

 

Dual monitors problem

My problem is that I connect two monitors to the computer (graphics card) and Windows detect always only one monitor.

When I click detect in display settings and the second monitor plugged to the graphics card, it writes me that other monitor can not be detected.

Why Windows do not detect that two monitors are connected and detecting only one?

I use Nvidia GeForce graphic cards.

 

What video card do you have? Have you gone to Windows Update yet?

 

SOLVED!
BIOS was the problem. Mine was version A09, after upgrading to A12 (Dell official) the system detected the notebook screen.