Hi,
Is this issue confined to a specific file? Are you able to install other program successfully?
This issue normally occurs when the device is not compatible with the current configuration of the system.
I would suggest you to download and install the latest chipset driver from Dell website before installing the wireless/bluetooth driver.
If the issue is specific to the driver file from Dell, you may post the question in Dell support forums for further assistance.
http://en.community.dell.com/support-forums/laptop/f/3518.aspx
Hope this information helps. Reply with the status so that we could help you further.