Its Depend your work there are 3 Best operating systems-: Windows, Mac, Linux. Windows is an easy operating system for user its OS interface is very premium look. Windows 7 likes many people long times run know all feature, windows 8.1 is some different and more feature and quick boot very fast processing. A lot people prefer to Mac OS, but the whole is different and its OS is very costly. The Linux operating system is very secure. I can suggest for your best operating system for your laptop " Windows "