Need more information please. Can you double-click the taskbar icon and open SecurityCenter then click Navigation at top right, then "About" at left.
Post what details are showing for VirusScan.
Also check that you system clock is accurate both time and timezone-wise.
If the SecurityCenter continues to show blank please see this thread for guidance regarding browsers, settings etc.
When we double-click (or right click) the task bar icon nothing happens at all.
OK best to uninstall via Control Panel, then run the MCPR removal tool listed under Useful Links above, reboot and reinstall from your online account.