|You need to install many drivers when installing a retail version of WinXP like you did. WinXP is older than the laptop so the required drivers may not be available.|
I addition, you could run into additional problems if the WinXP CD is the ORIGINAL version (no SPs) and the hard drive in the laptop is larger than 127GB or a SATA type.
Best to use the Dell restore or go to the Dell site for all the drivers. There should be a service tag number on the laptop. Go to the link below and enter that number to get a full list of drivers you can download. Download them and burn them to disk for future use as well as now.