upgrade to MP5 it will work
Please see note below on how stop SMC service on a desktop if its going through the roof
• Open regedit
• HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SYMANTEC ENDPOINT PROTECTION\SMC\smc_exit_test 1 to 0
Then from the Symantec installed DIR etc c:\program files\symantec\symantec endpoint protection\
• SMC –STOP
Then run an upgrade.
• SMC –START
Then all done !!!