Click your Start Button, then just type cmd and on the resulting list, right click Command Prompt and select 'Run as Administrator'.
Paste this into Command Prompt and press Enter.
regsvr32 /i "C:\Program Files\Total Defense\Internet Security\fsscanwizardcontextmenu_64.dll"
When that command completes, close Command Prompt and restart your PC to apply the change.
Then check if that resolves the problem, also, you may need to click 'Show More Options' on the context menu to see the entries on the menu.