If not, go to www.NVidia.com and download and install the driver.
Also, did you fully remove the old graphics system from the computer? Sometimes you'll have a conflict.
A basic guide for this is at http://www.basichardware.com/howto_install_a_video_card.html . Note: With an NVidia card, I would not use the drivers that Windows XP installs; I'd rather use NVidia's.
Hope this helps,
PS: Is Windows fully updated? If not, a visit to Windows Update is in order FIRST!
I recently installed a Nvidia GForce FX5500 graphics card into my PC (it initially had an integrated card)to improve frame rates and the look for games like Flight Simulator. This is does very well and looks superb. However when I run a video clip through Windows Media Player or play a DVD the colours are all wrong and has a bleached out look.
PC is a Packard Bell Pentium 4 2.8 ghz, 512mb ram Windows XP
Any ideas gratefully received