Symantec Desktop and Laptop Option for NetBackup

Hello,
Symantec gave this warning when I want to use NetBackup and it still appears after many tries to open the program. Can anyone help me please to fix this error ? What I did wrong ? Is there another solution for my PC ?
Thank you experts !

– [Alerts]
Warning V-139-32768-6
Invalid handle
Initialization of Notification dialogs failed (0x80000006)
For additional information regarding this error, click here.
