If it is a matter of Operating system customization, he can do so with various software. Some of them are;
Antivirus Software - He should first get an antivirus software because going on the net without one is quite dangerous as he could inadvertently get a virus. There are free antivirus software on the net such as Avast but he should probably get a paid version as they offer more protection.
Browsers - He will need a browser to get on the internet such as Chrome or Firefox. His laptop will have come with one but if he is not satisfied with that one, he can get others like the aforementioned ones.
Office Suites - He should get an office suit to help him perform tasks such as text typing, spreadsheets, database management, PowerPoints and the like. The most famous office suit is Microsoft Office but there are others he can get to accomplish the same tasks.
Media Players - His laptop will come with some media players but sometimes these can fall below expectations. He can get other ones such as VLC that will enable him to watch some media types that his default media software will be unable to play.
Utility Tools - There are various tools he could download to help him use the laptop better such as graphics boosters, system cleaners, hard drive diagnostic tools and the like.
