Advanced Office Password Breaker, or AOPB for short, is a program to decrypt Word and Excel 97/2000 files that have file open protection set, as well as Word and Excel XP files with default (Office 97/2000 compatible) encryption -- guaranteed, regardless the password length and complexity. This is being done by trying all possible encryption keys (instead of brute-force and dictionary attacks) and takes only about two weeks on single Pentium III/1000 PC (or just four-five days on faster dual-CPU systems).