A combination of holiday sales and the launch of Windows 10 weren't enough to slow the decline of PC sales, which have fallen to their lowest levels since 2007. Shipments declined by as much as 10.6 percent year-on-year in the fourth quarter of 2015, according to analyst firm IDC. Fellow analyst Gartner had similarly dire numbers to share: 75.7 million PCs shipped for the quarter, down 8.3 percent on 2014.

Overall sales for the year were just as bad, with IDC estimating shipments fell 10.4 percent to 276.2 million units, and Gartner pushing the slightly less terrifying number of 299.6 million units for an 8 percent fall.

The only manufacturer to show any growth for the year was—you guessed it—Apple, which managed to grow 2.8 percent according to IDC and 5.8 percent according to Gartner. Everyone else's sales shrunk, although Lenovo—the number one PC vendor worldwide—at least managed a mere 3.6 percent fall compared to the 6 percent-or-larger drops seen by HP, Dell, Asus, and Acer.

Both analysts blamed the drop in PC sales on a combination of factors: an economic slowdown in China; a strong US dollar; and the continuing growth of smartphones and other mobile devices. IDC also noted that free Windows 10 upgrades may have hurt PC vendors as consumers chose to upgrade their OS without forking out for new hardware. However, both analysts expect sales to pick up in 2016 as businesses—by far the largest market for PCs—start to upgrade to Windows 10.

Smaller companies that account for around 29 percent of the market have been hardest hit by the slump in sales. Outside of the top five PC makers—Lenovo, HP, Dell, Asus, and Apple—sales fell 21.9 percent, with larger vendors soaking up the lost market share. That said, unless there's a particularly compelling reason for folks to pick up a new PC in the near future—say, a generational leap in graphics performance, or a whole new interactive medium—everyone, including the big players, has a tough year ahead.