I'm having the exact same problem. tried installing a bunch of different divers from nvidia, none of them will install.

Checked Windows update and manufacturer site. Nothing that has worked so far.

UPDATE: Found the right drivers! Thanks for the help.

downloadcenter.intel.com/Detail_Desc.aspx

I can't find a driver that installs for Win8 Pro 32bit. The onboard card in my D620 is a NVIDIA Quadro NVS 110M. Tried the usual places - winupdates, nvidia and dell.  Screen resolution is at 1024x768 with the basic microsoft driver and I prefer to use it at native.  If anyone has a solution post it here.

I got mine to go up to 1280x1024 but still won't go up to the native 1440x900 or 1920x1080 when hooked up to a monitor.  the link for the driver posted by Shadow doesn't work for my computer, says it's incompatible. 

These drivers (http://www.dell.com/support/drivers/us/en/19/DriverDetails?driverId=R160485) works with my Dell 620 and Windows 8 as well :)
Took ca. 10 hours to find the solution :)

M

Thanks Alanmies!

Those drivers worked. I now have 1280x800. The max res for external seems to 1680x1050 but I need 1920 x1080. I guess this will have to do for now until someone releases something better.

YES thank you for your research Alanmies, that old Vista driver works great.  Like somebody said before, resolution maxes at 1680x1050 but that's way better than what I was getting.

If anyone finds a driver that supports 1920x1080 please post.