You need to make sure that all your development tools use the same version of adb
.
One easy way to do that is to open the Command Prompt
window as Administrator and run these 2 commands to delete all copies:
taskkill /f /im adb.exe
for %a in ("%systemroot%" "%userprofile%" "%path:;=";"%") do @del /q /f /s "%~a\adb.exe" "%~a\adbwinapi.dll" "%~a\adbwinusbapi.dll" 2>nul
Then reinstall the latest version of the platform-tools
package from the SDK Manager or manually by downloading and unzipping the package file (check adb
info page for the link) into the %ANDROID_SDK_HOME%
folder.
Also make sure that %ANDROID_SDK_HOME%\platform-tools
folder is included in your %PATH%
.