A small script to quickly disable Symantec Antivirus 11 (Symantec Endpoint Protection) for those moments that it needs to be disabled quickly:
Open up an administrative commandprompt and type the following commands:
sc config "Symantec AntiVirus" start= disabled
sc config ccEvtMgr start= disabled
sc config SmcService start= disabled
net stop "Symantec AntiVirus"
net stop ccEvtMgr
taskkill /IM smc.exe /F
Symantec Antivirus is now completely disabled