STEP1 Go to Device Manager:
Start > Right Click on Computer > Manage > Device Manager
STEP2 Check if Android ADB Interface exists or not in Device Manager.
Check if Android Device exists or not
-Yes>>Click on Triagnle sign of Android Device >> Check if [Phone brand] Android ADB Interface exists or not
-No>>Please install [Phone brand] Android ADB Interface Driver
STEP3 How to download and install the driver of [Phone brand] Android ADB Interface:
以下兩種方式擇一
-下載 ADB Driver Installer.exe 執行檔以自動安裝不同廠牌手機Android ADB Interface的驅動程式
-手動下載各大品牌手機(Samsung/Acer/Nexus/LG)的Android ADB Interface Driver :
How to check if adb driver has been installed successfully?
Launch CMD.exe>key in "adb devices" in cmd window:
*Reference*
http://donandroid.com/how-to-install-adb-interface-drivers-windows-7-xp-vista-623