Oh! Sometimes we even try looking for it in the Windows Registry, but not all of us are not technically sound, isn’t it? So, all of a sudden we are left in the lurch wondering how to recover the unique product key or the serial number to continue.īut, if you had one of the product key finder programs installed in your PC, you would not have to go through any hassle. So what happens when you have lost the product keys or the passwords? You are either frantically looking for the original installation disc, the order confirmation email or the manual.