Nothing really hard, just some crypto :)
To validate the challenge you must find the serial for: Zenk-Security
And if you want get access to the source code you must find the serial for: xylitol
Please do not post solution on internet, thanks.
Good luck & have fun :)
PS: Yeah v0s, i've liked your idea of 'Sorry' image.
(right click to close it)
And congratz to all 23 guys who solved my previous KeygenMe
Win32 ASM > *