it could be that you should de-install your old video card (software & driver)
or maybe reinstall your DVD viewing software (power/win DVD)
de-installing the software for your old video card should be easy, de-installing the driver could be a lot more difficult
do this.
open a command prompt.
and type.
Code:
set devmgr_show_nonpresent_devices=1
start devmgmt.msc
go to "view" and enable "show hidden devices"
now you can see all the devices that have ever been in your computer