my system came with windows XP but i decided to install windows 7 and after the installation, I found out that my bluetooth, graphics and even wi-fi were no longer working. please what can i do
Welcome to the Dell Community @Emmy Praiz
Please post the Hardware ID's and I can help you find the drivers.
I have an archived image for the D600 and W7 so I know it can be done.
Dell does not offer Windows 7 drivers for the D600. However go to this forum post as there are some suggestions to finding the drivers you have to install for the hardware to work properly.