Most cracked versions of Korg Pa Manager come packed with . Because the software interacts with USB drivers (to connect to the keyboard), malware authors exploit this to gain kernel-level access to your PC. Once installed, a fake "keygen" might give you an activation code, but it also gives hackers your banking credentials.
Note: Codes are not cross-compatible. A Pa4X code will not work on Pa5X software. Korg Pa Manager Activation Code