BELLEVUE, Wash. — It used to be that a new version of the Windows operating system was enough to get people excited about buying a new computer, giving sales a nice pop.

Not this time. Windows 8, the latest edition of Microsoft’s software, failed to pack shoppers into a Microsoft store in a mall here last week, at a time when parking lots in the area were overflowing. The trickle of shopping bags leaving the store with merchandise was nothing like the steady stream at a bustling Apple store upstairs.

Claude Ballard was among the customers at the Microsoft store who tried out Surface, a new Microsoft-designed Windows tablet. Mr. Ballard, who described himself as a “semiretired” computer systems manager for a real estate firm, said he was intrigued by the eye-catching design of Windows 8 — but not enough to scrimp to buy a new computer this year.

“It’s economics, really,” he said. “It’s going to be a better year for my mechanic than it is for me.”