I'd use a/the in both sentences, Jack, because they are two (yes, countable) types of utilities. If they are in fact the names of the utilities, however, then they should be capitalized instead: Device Manager and Component Service . On the other hand, there could be usage peculiar to computerspeak, which is not, as we all know, necessarily grammatically normal.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.