Apple delivered its highest customer satisfaction score, according to the American Customer Satisfaction Index (ACSI). Windows PC makers also due to the success of Windows 7.

Among the PC leaders:

Apple had a score of 86 on a 0 to 100 scale. That tally was Apple's highest ever.

Dell, Acer and HP have a three way tie at 77.

Claes Fornell, director of the National Quality research Center at the University of Michigan, said in a commentary:

Apple continues its dominance, leading the PC category by a wide margin for the seventh straight year. Customer satisfaction with Apple’s computer products, including the iPad, rose 2% to an ACSI of 86—the highest score ever for Apple. The company now has a 9-point lead over its nearest competitor. No other company in the ACSI has as formidable a lead within its own industry. Innovation and product diversification, along with strong customer service, have long been at the center of Apple’s success.

And Fornell on PC scores: