Windows Phone 7
Windows Phone 7 Reuters

Microsoft CEO, Steve Ballmer has hit out at the "complicated" Google-made Android mobile operating system, saying that only "computer scientists" could figure out how to use one.

Ballmer criticised the mobile OS at the annual Web 2.0 Summit and asked delegates to compare the usability of a Microsoft Windows powered phone compared to a Google Android handset.

"You don't need to be a computer scientist to use a Windows phone and you do to use and Android phone...It is hard for me to be excited about the Android phones." He said.

He continued by applauding their main competitor, Apple: "Apple is a good competitor, but a different one."

"Both (Apple and Windows handsets) are going to feel very good in your hand and both going to look very beautiful physically."

However, he did mention that he considered the Windows phone to be superior, due to it putting the user's needs in the foreground of the mobile experience.

"A Windows phone gets things done."

Although Ballmer mentioned that the Windows phone should be compatible on lower end phones to incorporate a wider audience, he also confirmed that Windows are not seeking to build compatible hardware to rival the iPhone.

"We are focused on enabling hardware innovation...We have been very successful enabling hardware innovation and will continue to do so."