"不過在重裝的過程中發現windows係統警告說該安裝程序沒有通過係統的徽標測試"
this is not a problem. not every program is tested by MS.
you may need some sort of data file generated by your old installation where a password is stored. if you did a fresh install of XP, check if that file was ever backed up. if u did an upgrade from 98 to XP, try to find it on your computer