It appears that Coupons.com is having issues with a virus being in the downloadable coupon software. (Several readers from Hip2Save are reporting problems) I would recommend, that until further notice, you DO NOT download anything from Coupons.com. If you already have the printer and are problem free, you can still print coupons, as they are not being downloaded to your computer.
This is a great article on some concerns from a technical standpoint of Coupons.com.
If you are unsure weather or not Coupons.com software is on your computer, test it here.