I am happy that I own this laptab computer. it comes with windows 8 os which upgrades to windows 10. it is really good but keypad is very hard and noisy and not user friendly. also keyboard is detachable and there is fixed angle between keyboard and display which makes it truly unfriendly. micromax could have sought about this particular problem before launching it. there is only one usb port in keyboard and it works when it is connected with tab.speaker sound is worst and these two main features(poor sound+ hard key board) disappoints micromax lovers. why speakers are so weak, even smaller tablets and mobile have better loudness of sound so that any one can at least listen clearly without earphones.good features are 3g sim slot for mobile broadband access(but no sim based voice calling), bluetooth, wifi connectivity and long battery backup(up to 6 hours). any way this is good affordable machine and value for money.