Hi mconine,
May I know the Operating system installed on the computer?
Check if the wireless works in Safemode with networking (Windows 7). Restart the computer and tap F8 at Dell logo. Select Safe mode with networking.
For Windows 8 refer the following link for wireless troubleshooting:
Refer the following link which has settings for wireless internet:
For more troubleshooting refer the following link:
Awaiting your response!