Dual Monitor Problem

[Guest]

I have been able to enable dual monitors in the past. Yesterday when I tried
to extend to the second monitor, it wouldn't take -- the check box was
unchecked both after I clicked on Apply or OK. Yesterday, I rebooted my
computer and it worked fine after that. Today, nothing is working. Any
ideas why this isn't working?

Thanks!

Tom
(e-mail address removed)

 

[Walter Clayton]

And the video card(s) involved are what?