Hello I am new to reinstall win for your computer. Along with the private key of blockchain also lost.
Anyone can help me retrieve private key of blockchain.
Thanks.......................
As I know, you can't recover it any more.
If he has the e-mail on wich he registered his blockchain.info wallet then ask support for it to recover.
Unfortunately, that won't work if he forgets the password. Blockchain.info would most likely have sent him the identifier the first time he registered and every payment thereafter. If he does forget the password, he can key in the mnemonic phrase on blockchain.info to recover the password.