The default password that should work for most of the Symantec Antivirus Corporate Edition client uninstallation is “symantec“.
This is what you should do if the default password didn’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.