Spotify wasn't just serving up tunes over the last few days.
The streaming music company confirmed that some listeners on the free version of its service saw "questionable website pop-ups" that continually opened up a device's browser. The company, which counts about 70 million people as users of its commercial-driven free service, confirmed the problem in a response to a user complaint on its community site.
The problem is called "malvertising" -- aggressive or ill-intentioned ads that, like malware, take control of some functions of your computer. Some users complained of actual malware getting installed on their computers.
Spotify blamed a single ad and said it has shut that ad down. "We will continue to monitor the situation," it said.
The company declined to comment beyond the statement.