Hi,
1. Does the issue occur while connecting with all the devices or with any particular device?
2. What exactly happens when you try to connect?
3. Are you getting error message?
4. Did you make any changes to the computer before the issue occurred?
I would suggest you to follow the steps provided below and check if it helps:
**Method 1:**Try to run the hardware troubleshooter and check what the issue is and fix it accordingly.
Follow the link given below open hardware troubleshooter.
http://windows.microsoft.com/en-us/windows7/Open-the-Hardware-and-Devices-troubleshooter
**Method 2:**Check for the Bluetooth support service status:
a. Click Start, click Run, type services.msc, and then click OK.
b. Double-click the Bluetooth Support service.
c. If the Bluetooth Support service is stopped, click Start.
d. On the Startup type list, click Automatic.
e. Click the Log On tab.
f. Click Local System account.
g. Click OK.
h. If you prompted to restart the computer, click Yes.
**Method 3:**Also****I would suggest you to update Bluetooth driver for hardware and check if the issue still persists.
Update a driver for hardware that isn't working properly: ****http://windows.microsoft.com/en-us/windows7/Update-a-driver-for-hardware-that-isnt-working-properly
Note: If you don’t find the drivers in Windows updates, go to manufacturer’s website download the latest drivers and install it.
**Method 4:**Also****try to update the wireless driver for hardware and check if the issue still persists.
Update a driver for hardware that isn't working properly: ****http://windows.microsoft.com/en-us/windows7/Update-a-driver-for-hardware-that-isnt-working-properly
Drivers for Dell Inspiron 14 Intel N4050: http://www.dell.com/support/drivers/us/en/04
Hope this information is helpful.