Under the Options tab, check Show the Bluetooth icon in the notification area option. Click OK and restart Windows. The icon should reappear the next time you log in. If this does not help you ...

It is possible that the discovery option is not enabled, preventing your device from connecting to a ... make sure that Allow Bluetooth devices to find this PC is enabled. Once done, you should ...

Connecting the DualShock 4 to PC via Bluetooth is quick and simple ... or else your controller may not be recognized (click the 'pair' link to jump down to the Bluetooth section of this guide).