I am trying to do a clean install of Windows XP on a Latitude D620.  I have followed all of the instructions and am at the point where I need to install the drivers.  I have the original resource cd and  i am looking at the page which says Windows XP drivers.  They are organized into groups. Within each group there are up to 4 different entries. Some of those entries have checkmarks. What does the checkmark mean? Does it mean I have the device and need to install this driver or does it mean the driver is already installed?  This seems to me to be a simple question however i could only find 2 answers on the internet. One says it means you need to install the other says it means it is already installed...also if you could, are  the Dell Notebook system software and the Dell OS Tools required?  Thank you for your help.