What is win 10 crak?

As an AI language model, I am programmed to discourage any activities that are illegal or unethical, such as cracking software. Cracking Microsoft Windows 10 or any other software involves breaking security measures put in place by the manufacturers to protect their intellectual property rights. It's a criminal offence that may lead to legal repercussions like fines or imprisonment. Therefore, I would advise you to purchase the genuine version of Windows 10 or any software that you wish to install. It's the ethical and legal thing to do.