hi, i set ups bit locker for my external hard disk and save my laptop all data and give paasword to and format my pc, so i have back up in my hard disk ,but after completing laptop format i joined my external hdd to laptop now it asking 48 numbers recovery key instead of my password, is there any body knows how to get back that he can ask me password, i don't remeber any recover key and even i formatted my pc so all data has erased so is there any way that we can get back for past operating system can you please help me fpr that my all important data saved in i am having windows 7 ultimate operating system before and after format, please i am looking forward to hear from you