The default password that should work for most of the Symantec Antivirus Corporate Edition client uninstallation is “symantec“.
If the default password doesn’t work.
1) Go to Start -> Run and type regedit
2) Navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\INTEL\LANDesk\VirusProtect6\CurrentVersion\Administrator Only\Security\
3) Double click on the value name “UseVPUninstallPassword” and change the value from 1 to 0
4) Close the registry and retry the uninstall.