It is possible that you have an English or a native keyboard.
Instead, you need to type Burmese or Myanmar. In Windows when you type Zawgyi, nothing shows up. So when we say Burmese Keyboard or Zawgyi Keyboard, they all mean the same. Zawgyi, on the other hand, refers to the non-Unicode typeface for the Burmese script. Just before we start, Myanmar and Burma (old name) are the same.