SAMInside is a powerful tool which can help us to recover users passwords from Microsoft Windows NT, 2000, XP and 2003. Programme is very small and doesn't require installation so we can run it from floppy disc, USB-disc or CD/DVD discs. SAMInside has six types of passwords attacks: brute force attack, distributed attack, mask attack, Dictionary attack, Hybrid attack, pre-calculated tables attack. Programme code has been written completely in Assembler so we can make use of all power of our processors. SAMInside is one of the not many programmes which can brake passwords coded in SYSKEY system.