They were probably OK. It's best not to defrost the chicken in the microwave because it will leave areas that are still frozen and other areas will be nearly cooked (that's even on the defrost mode). What I do is take the chicken out of the freezer and leave it in the fridge for 12 - 24 hours to defrost.
Make sure it is cooked right through, it should be totally white with no pink/red bits or juices.
Make sure it is cooked right through, it should be totally white with no pink/red bits or juices.