Silent Install ZONE ALARM

[THERMALTAKE]

I've got one small problem. I cannot finish silent install of Zone Alarm. Everything during install is good but at the end I have message that I must restart Windows and there is no option to do it later. I was thinking that I can close this process after install this program in taskmgr. But there is problem. Everything is good when this process is first at the list of all process but I don't know how finish this process when it will be for example the last. Any ideas??