USB Debugging not working, tried everything

Question

I know this is kind of obsolete, but I can't get it to work. I have Android 4.2.2 and Windows 8.1. When I plug it in USB debugging mode the command: adb devices there is an empty list. I tried:

• installing "ADB, Fastboot and Drivers"
• unlocking Developer Options in Android
• adb kill-server / adb start-server
• changing USB port
• restarting Windows and Android
• deleting "C:\Users\****\.android\" contents

Nothing works. Please help! Thanks in advance, Adi.

Answer 1

Probably you should install Google USB and Web Drivers in SDK Manager:

Also maybe you should try to install Samsung Android USB Driver.

See also http://www.itjungles.com/samsung-galaxy-s-ii-how-to-enable-usb-debugging.html and Android:use debugmode in galaxy s2 (maybe install Samsung Kies).