method One:
Since you are installing the new system, the first reason is likely to be that the Bluetooth driver is not installed. Enter Device Manager to view the Bluetooth status and see if the Bluetooth device is visible in Device Manager. If there is a yellow exclamation point is driving the problem.
Method Two:
WIN8 system has a separate Bluetooth switch, you can check whether the flight mode is enabled, whether the Bluetooth switch is turned off.
Method Three:
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. You can also start directly in the computer. The method is as follows:
1, first run the window to enter the "services.msc" to open the service settings, in the Service Settings window, find "Bluetooth Support Service" services, in the Bluetooth service click on the right mouse button, open "Properties";
2, second, in the Bluetooth service click on the right mouse button, open the "Properties", the Startup type selected as "Manual", service state click "Start", start this service can be.
Method Four:
Also may be your computer BIOS in the blue teeth 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.