The world's biggest - China's Lenovo - posted another drop in sales on Thursday (November 16).
Revenue fell 16% to just over $14.4 billion for the three months through September.
That was worse than expected, and the firm's fifth-straight quarterly decline.
Lenovo and rivals enjoyed a huge boom during lockdowns as people geared up for working at home.
But the aftermath is proving painful, with PC supply now exceeding demand.
In May, the company reported a 14% decline for the year through March - its first annual fall since 2019.
The worldwide market for PCs remains very sluggish.
Industry researcher Canalys says worldwide shipments were down 7% in the second quarter of this year.
To improve profits, Lenovo is now focusing on non-PC products.
That includes smartphones, servers and IT services.
The earnings numbers coincided with news that Lenovo is suing Taiwan-based rival Asus for patent infringement.
It's seeking damages in a California court case.
Asus didn't comment on the news.
Lenovo shares sank around 3.5% on Thursday following the downbeat results.