Hi,
Select the numbers that are highlighted i.e.
Here's a screenshot of my own system restore points. Note for this month I only have four made, one today and three from four days before. See the highlighted ones in bold? Those are the Restore Points. If you don't have such highlighted and bolded numbers you probably have System restore and checkpoint creation turned off or deleted.
You can also check if you have any Restore Points by clicking on the arrows on the left calendar box, the left arrow to see if previous months had any saved. If it doesn't allow you backwards you won't have any I'm afraid.
So do you see any numbers in bold? If you do click on them and Restore to that date.