Solving “adb server version doesn't match this client” error [duplicate]

Answer 1

For anyone still having this issue ( on windows ):

1. Open task manager
2. Go to processes and select the ADB.EXE
3. Right-click on it and check the properties
4. Most likely you will see a different path from where the adb.exe is running ( either HTC manager, Genymotion, etc )
5. Kill the process
6. Run ADB.exe from your android studio path ( in my case: C:\Users\%user%\AppData\Local\Android\sdk\platform-tools )

This solved the problem in my case.