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Method 2 – Enter Recovery Mode using ADB on Windows
Step 1 – Make sure USB drivers / ADB drivers for Galaxy A5 have been installed and ADB is configured on your computer.
Step 2 – Connect your Galaxy A5 to your PC with a USB cable and install ADB drivers (if needed).
Step 3 – Navigate to android-sdk-windows\platform-tools directory and open Command Prompt (Shift + Right-click anywhere in the folder > Open Command Prompt).
Step 4 – Type in the following command and press Enter.
adb reboot recovery
Step 5 – Your Galaxy A5 will turn OFF and then boot into the Recovery Mode. Navigate up and down using the volume keys and select with the Power button.