It's not surprising that lost iTunes backup password and cause you can't restore the backup file. Luckily, Daossoft iTunes Password Rescuer can help you unlock your iPhone/iPad/iPod backup password very simply and then you can restore contacts, calendars, notes, audio, videos, photos and apps from computer to iOS devices.
Platform: Windows 2000/2003/2008/2012/2016/XP/Vista/Win7/Win8/Win10(32 bit & 64 bit)