In Backup and Recovery Free 10.1 x64 on Windows 7 x64, when I do a differential backup of the Windows partition with hot processing turned off, I receive the error message 'Can't open/create file' almost immediately after the 'Progess Information' window opens. The differential backup was not created. I checked and altered permissions of the backup volume to allow Everyone full access, but the same error message was given. Doing the same backup except with hot processing turned on succeeded. Doing a full backup of the Windows partition with hot processing turned off succeeded. Another issue: backups of the Windows partition created with hot processing turned off results in an archive whose modified time is off by exactly 6 hours from what it should have been.