My name is Deepa and I work for the Social Media and Community Team at Dell. It seems that you need to get the drivers for windows 7(32-bit). Please let me know the specification of the bluetooth card installed in your system. You need to go to the website www.support.dell.com and there you need to enter the service tag of your system. It will give you the complete information about your system.
Although I am providing you a link which is for Intel bluetooth drivers for 32-bit windows but it is not tested,if you want you can try this link:-