1. First and foremost, it is most likely that the Bluetooth driver is not installed.
Click on My Computer, enter Device Manager, view the Bluetooth status, see if the Device Manager can see the Bluetooth device. If there is a yellow exclamation point is driving the problem.
The 2.Windows 8 system has a separate Bluetooth switch to see if flight mode is enabled and if the Bluetooth switch is turned off.
3. Bluetooth service startup key shutdown caused.
Sometimes the third party security software to optimize the boot when the startup item will turn off the Bluetooth service startup, Bluetooth boot for Bluetooth Support service, in the security software to open him on it. Can also be started directly in the computer. The method is as follows:
First run the window to enter "Services.msc" to open the service settings, in the Service Settings window, find the "Bluetooth Support Service" Services, the Bluetooth service on the right mouse button, open "properties."
Second, in the Bluetooth service click on the right mouse button, open the "Properties", the Startup type selected as "Manual", the service state click "Start", start this service can be.
4. It is also possible that the computer BIOS in the blue tooth off, some computer BIOS can switch to Bluetooth, shutdown into the BIOS, to see if the Devices option USB Setup has Bluetooth options, this option status is enabled.