This is the response I received on a different forum and when I checked my original system configurations, there was no mention of bluetooth:   Here's how to check for physical presence of Bluetooth in a Dell Ex510 system: What you might be experiencing is that the radio switch in the front left of the palm rest is set to control both wi-fi & Bluetooth and is currently turned off. The setting is in BIOS in the same section as enabling/disabling radios. You can set it to only control wi-fi so that Bluetooth is controlled by its drivers in Windows.  
I've posted this question in another forum but thought it'd be better here since it's Dell specific.  This is my first question to the site. I have a problem where I can't turn on the bluetooth on my laptop. If anybody could give help me solve this I'd be very grateful! Laptop Details - Dell Latitude E5510. - Windows 7 32-bit. Problems - The bluetooth light is not lit (WiFi is lit). - The bluetooth icon is not in the system tray. - There are no settings in 'Control Panel' for bluetooth. - There are no drivers in 'Device Manager' for bluetooth. Troubleshooting Already Attempted - Ensured that bluetooth was enabled in the BIOS. - Updated BIOS to version A11. - Downloaded and attempted to install drivers (R285455.exe, R260222.exe, R296919.exe). When I try to run R260222.exe, it tells me that it is incompatible. When I run the other two drivers, it extracts the items but then asks me to "activate bluetooth using wireless switch". The switch is already on but no light appears for the bluetooth symbol. It's a catch 22! - Ensured that the 'Bluetooth Support Service' was started.  I've been searching for the solution for hours now and just have no idea what else to do. If I've missed out on any information, please let me know.I'm beginning to think that there is no physical bluetooth adaptor in my laptop at all.
Dell Latitude E5510 - Can't turn on my bluetooth