When I click on More Details for Security Status, the window flashes on the screen a few times and disappears. I've attached what the window appears like.
Ok, it seems this has helped.
https://www-secure.symantec.com/connect/forums/reports-sepm-have-stopped-working#comment-3408111
check your internet explorer settings.
is it IE 9?
http://www.symantec.com/business/support/index?page=content&id=TECH158284&profileURL=https%3A%2F%2Fsymaccount-profile.symantec.com%2FSSO%2Findex.jsp%3FssoID%3D1352147535418695j127ZU7Y3XNj0AbBRYgIbarm232D1C4oQL
Check and turn off IE Enhanced security
Thanks, I've made a post but it didn't add it .
I added localhost to the compatibility view list.