check if your system has been patched against WannaCry ESET EternalBlue Checker a free tool to help determine whether your Windows machine is patched against EternalBlue exploit, which is responsible for the WannaCry ransomeware infections. If your system has not been patched, the program will display a message and direct you to the official Microsoft page from where you can download the patch and protect your system. EternalBlue Checker is a simple command-line utility without a GUI, simply run the standalone EXE file and delete if if you no longer need it. Copyright Snapfiles.com