This is only for windows 7 and installation of SEP 12.1
--> First Download SEP_Package_unmanaged from following link
Download the latest version of Symantec Endpoint Protection
--> After Download SEP_Package_unmanaged extract it.
--> Than right click on setup.exe and run as administrator.
(Because if you want to advantage of all SEP than you must run with administrator.)
4. Than it will process automatically.
--> Setup will automatically download catalogs file for installations.
--> After complete installation your machine ask for reboot
SEP Gives you following advantages for security purpose.
--> You can also check the antivirus logs, there are different types of logs available, following screenshot gives you idea about different types of logs (Defult Scan logs, Risk logs, System log.)
--> You can also investigate for the "Proactive Therat Protecation logs, Network Therat Protecation logs and Client Management logs".
If any concern than let me know.
Thanks,