-snip-
I've made clean installation of Windows 2-3 times since I've entered the passwords last time.
I hope the  investigation of this case can improve the Bitcoin world and can prevent such incidents in future

first of all i am sorry for the lost. but did anybody here asked op to sign a message to prove the ownership of the address? it's important right to claim that the address is really owned by op. and after that we can go discussing this . no offense op okay