The genuine keygen.exe file is a software component of key generator.
A keygen is a key generator used for generating licensing keys or serial numbers for numerous paid software that may be protected by anti-piracy mechanisms. Keygens enable users to generate keys in order to activate a licensed program. Once a license key is generated for a particular software, keygens often use a mechanism to prevent the software from validating or verifying the serial key through its publisher. Such mechanisms may involve patching the program memory or activation server emulation. Keygens are usually created through reverse engineering and software cracking by programmers colloquially known as 'crackers'. Keygens are primarily available through P2P (peer-to-peer) networks. They are mostly labelled as PUPs (potentially unwanted software), and are recognized as harmful due to their unverified source.