From this page http://www.symantec.com/avcenter/download/pages/US-SAVCE.html is states:
"Symantec Antivirus 9.x will reach its End of Support Life as of March 31, 2009. Virus definition updates for version 9.x will be discontinued on April 1, 2009.Symantec Antivirus 9.x will reach its End of Support Life as of March 31, 2009. Virus definition updates for version 9.x will be discontinued on April 1, 2009."
uninstall client without password
Go to this key(If not exists create it)
HKLM\SOFTWARE\Intel\LANDesk\VirusProtect6\CurrentVersion\AdministratorOnly\Security /v LockUnloadServices
Make this value 0, this is the password to stop Symantec services.. Similarly
HKLM\SOFTWARE\Intel\LANDesk\VirusProtect6\CurrentVersion\AdministratorOnly\Security /v UseVPUninstallPassword
Make this value 0, this is the password asked while uninstalling...
OR
u can use nonav/cleanwipe tool.