Go download Belarc Advisor
which will give a report of your PC hardware:

www.belarc.com/free_download.html
(bill, Wed 26 Aug 2009, 1:19, 2 replies, latest was 16 years ago)

Tried that,
Display: none detected
(TheColonel, Wed 26 Aug 2009, 1:21, Reply)

Doh!
Is it a custom build or a branded machine?
(bill, Wed 26 Aug 2009, 1:28, Reply)

I haven't tried it before but maybe GPU-Z can tell you
www.techpowerup.com/gpuz/
(bill, Wed 26 Aug 2009, 1:30, Reply)

After it thinks for a few minutes you'll get something like this in the display section:
LogMeIn Mirror Driver [Display adapter]
NVIDIA GeForce 9800 GX2 [Display adapter] (4x)
AOC LM-700 [Monitor] (17.1"vis, s/n T7KF1CAG12071, December 2001)
DELL 2407WFP [Monitor] (24.2"vis, s/n CC30366U18VS, June 2006)
Generic Non-PnP Monitor

So in my case I'd be heading to nVidia's site for drivers.
(bill, Wed 26 Aug 2009, 1:27, Reply)