While installing the sample data for Magento 2, I encounter this error. 

> 
> [Magento\Setup\SampleDataException] Error during sample data installation: Class Magento\Sales\Model\Service\OrderFactory does not exist
> 
> 
> 

Can anyone guide me in proper direction?
Any help will be appreciated.

[![class doesnt exists](https://i.stack.imgur.com/ySvao.png)](https://i.stack.imgur.com/ySvao.png)