The safest and most reliable way to get a key is through the official Hasleo website . They typically offer:
Cracked versions of WinToUSB are notorious for creating bootable USBs that fail after two weeks. Because the crack disables the license verification DLL, the writing process corrupts the bootloader signature. You will create a USB stick that works perfectly for three days and then crashes with a 0xc000000f error (Boot configuration data missing). You lose your time, your data, and your sanity.