1. Your computer will not show any other device like a DVD or a USB which is great issue while working with windows 7 starter.
2. Windows 7 starter can only run in 32 bit and not in 64 bit which means it doesn't support the computer which is of 64 bit.
3. Desktop is locked which means that you cannot change the desktop even one time this is the major reason why many people doesn't install windows 7 starter.
I want to suggest you that if you are thinking of changing your windows than don't go for windows 7 starter as it has many problems which I have listed above.