After upgrading PGP Desktop, you are unable to decrypt email messages or files.
Public-key cryptography uses two keys (called a keypair) for encrypting and decrypting. One of these two keys is your private key and the other is your public key. Your private key is kept secret and you distribute your public key to others to encrypt email messages and files.
This can occur when the keyring in PGP Desktop does not contain the private key for the corresponding public key to which the file or email message was encrypted. If you delete the PGP folder prior to upgrading you must import the keypair which includes the private and public key.
Import PGP Keys
There are several ways to import someones public key and add it to your keyring. These methods include:
Import within PGP Desktop
|Note: A keypair including the private and public key display in the PGP Keys Control box with a blue key as pictured below.|