Dual Monitor Problem - Only 1 monitor working

I have recently built a new box with a clean install of Windows 7. Initially I only had 1 monitor and things worked fine. I decided to add a second monitor and that is when the problems started.

When the system boots both monitors display all of the bootup information and and both monitors display the Windows 7 Startup screens. This tells me both monitors and connections are good.

Once Windows loads only monitor 2 has a display on it. Monitor 1 is blank. I have check and both monitors are running the same, and latest drivers. I have gone into windows and it shows two monitors, but I can not get a display on monitor 1.

This is the first time I have had dual monitors so it may very well be a user error, but I am pretty computer literate.

Any guidance would be appreciated.

Thanks in advance.

Go to Control Panel>>Display and then go to Change Display Settings. Under Multiple Displays go for "Extend these displays".

Are you using 1 video card with multiple connections? or Dual video cards ?

1 Video card with 2 DVI outputs. Radeon HD 5850

Is it set to "Extend these displays"?

Problem resolved....I hope. I re-installed the drivers again and then power-cycled the PC as reboot did nothing. 2 monitors are not visable.

Thank everyone!

So you have your dual screens running now?

Yes all is working.

Thanks

Excellent, enjoy the extended real estate