Norton Action Needed Disk Optimization Doesn't Go Away.

Hey all,

Quite simple really. Renewed my Norton Internet Security etc.. and well I was just checking it today. 

My pc isn't running slow at all but it flagged for disk optimization. So I thought  why not, put it through the optimization and well it completes but says there's still an issue.
Is this just a problem with Norton or is there something wrong with my drives? 

I have OCD and well little error messages in the system tray bug me.

Windows 8.1 x 64.
I run one SSD 128GB - Windows OS
Then a standard 1.5TB HDD for games.

Pc is pretty much used for gaming.

Any insight would be greatly appreciated. 

Many Thanks.