A quick way to pair bluetooth keyboard and mouse - ideacentre A300
With normal conditions, it would take a long period of time to manually pair the Keyboard & mouse because you need to use buttons on screen to login. Furthermore, manually pairing steps are much harder than the way below.
Do the pairing before the PC enter Windows
Turn on your PC
Press and hold the Signal button on your Keyboard on the left side.
Wait a moment, you will see the blinking light on top.
Press and hold the Connect button on the bottom of your Mouse
You will see blinking light at front/top of your mouse. Press the signal button behind the stand.
Your pc will automatically search and sync I/O bluetooth device, and there will be a dialog box appear, requiring to enter the pin code from your keyboard
Pairing successful - Message will appear: "Wireless keyboard and mouse paired with this computer".