Microsoft Corp.’s line-up of Surface tablets, laptops and desktop computers has always been a paradox.

The software company’s surprise foray into hardware became a billion-dollar-plus business and even managed to outclass long-time rival Apple Inc. with its Surface Studio desktop machine last autumn, according to some tech critics.

At the same time, the Surface range competes with Microsoft’s long-standing PC maker partners, such as Dell Technologies, Lenovo Group Ltd and HP Inc, which pay billions of dollars to license Windows, Microsoft’s traditional cash cow.

Those two facets came into sharp relief in the latest quarter, when Surface sales suffered while Microsoft’s own Windows licencing customers prospered.

Surface revenue declined 26 per cent to $831 million, its lowest tally in a year.

Meanwhile, the overall PC industry staged a slight comeback, notching a 0.6 per cent gain in shipments for the first time in years, according to IDC.

That helped drive Microsoft’s Windows licencing revenue up five per cent this quarter.

Effectively, Microsoft lost in Surface sales but it gained in Windows licencing.

It has always been part of Microsoft’s Surface strategy to release flagship models that goad the rest of the PC industry to improve its products, said Microsoft investor relations director Zack Moxcey.

He said competition from PC makers selling lower-priced hardware, along with some Surface hardware nearing time for an upgrade, led to the lower Surface sales.

“It’s definitely about driving the health and performance of the broader windows ecosystem,” Moxcey said.

Buried in the supplemental information Microsoft provides investors, there was further silver lining. The company said sales of Windows licences destined for consumer PCs was down one per cent, but revenue for more lucrative Windows licences for business and educational computers was up 10 per cent.

Moxcey said this was attributable to sales of higher-priced machines, especially for businesses. “That carries a higher revenue-per-licence for us,” he said.

The data fits with Dell’s latest results, as the PC maker’s sales of computers to businesses rose 11.6 per cent year over year to $6.6 billion in its last quarter, versus 8.5 per cent growth for consumer PCs.

Rebounding sales of Windows PCs to schools and businesses is a boon for Microsoft, which is staking its comeback on business and productivity software.

And higher Windows revenue per licence means that the Surface strategy – to pull the PC industry back upmarket with expensive flagship machines after a years-long race to the bottom on prices – might be getting some traction.

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