Can't turn System Restore back on

I've followed instructions through just about every source I could find and nothing seems to be helping. I've gone through the system properties-system protection, but it won't let me click on anything. It's just not giving it to me as an option to click on anything, not even to change between the drives. I'm signed in as the administrator (I'm the only user on this computer) but it simply won't let me. I'm at 50% available disc space, so I don't see that being the problem (could be wrong). The only thing I can think of is the virus issue I recently got through. It was one of those rogue 'antivirus' fake things...got it cleared up, but could it have screwed this part up? I'm posting a picture of what I'm getting...hope someone can help!