Cook noodles according to package directions. When noodles are done, drain well. Do not rinse, it make the sauce stick better.
Add shrimp to a nonstick skillet. Cook the shrimp for 1 to 2 minutes on both sides. Shrimp are done when they turn pink. Don't over do it they will be rubbery. Remove shrimp to a bowl or plate.
Add shrimp to the pasta, and then add the alfredo sauce and sour cream to the noodles and shrimps. Then sprinkle the salt and pepper into the pot. Cook for 4 minutes or until the sauce start to bubble. Then set for 2 minutes and serve.