When closing PGP Desktop, the error message The automatic backup of your keyring has failed is displayed.
This error can occur when the PGP keyring is located in a folder that is inaccessible and the option to backup your keys when exiting PGP Desktop is enabled. By default, the PGP keyring is located in the PGP folder within My Documents.
For example, this error can occur when your My Documents folder is redirected to a network share and the network share is unavailable.
Use the following to confirm the location of your keyring files
Backup Keyring options
The options to backup your keyring are displayed below Backup. You can specify a location other than the default keyring folder.