Can I cook a thawed turkey?
Check the cooking instructions - if it says to cook from frozen, and doesn't mention defrosting as an option, it probably isn't safe. Some foods are meant to be placed in the oven frozen, and defrosting them increases the risk of stomach upset because of various bacteria levels. If, on the other hand, it gives defrosting instructions as well as, or instead of, saying cook from frozen, it should be okay.