Re: Dell Wireless and Bluetooth Drivers - Windows 7/8

Check out this post here:

http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/error-message-cannot-start-the-bluetooth-stack/38cc3e5e-2d5b-4aa6-9526-e43c879d64fc

• Click WINDOWS +R on your keyboard
• Type services.msc
• Check that every service, having name "Bluetooth ...", in the list isn't disabled
• If it has "Disabled" in "Startup Type" column, double-click on the service
• Change "Startup type:" to "Automatic"

If that fails try disabling all the Bluetooth Services and restarting your computer, then re-enabling them.