Which company's laptop is best in services and realibity dell, lenovo, hp as i want to buy new laptop?

According to SquareTrade, a company that offers third-party extended warranties, Asus, Toshiba, and Sony have the three lowest claim rate of covered laptops. The study I'm linking is from 2009, so it's a bit dated. The data was accumulated from thousands of covered computers at the time, so that it for what you will.

From personal experience, I only purchase Toshiba laptops. I've owned four in twelve years and have not had serious issues with any of them.

https://www.squaretrade.com/htm/pdf/SquareTrade_laptop_reliability_1109.pdf