Even so, the third quarter wasn't an out-and-out disaster for all involved. Who were the winners and losers? Here are eight takeaways on the state of the PC industry.
1. The U.S. outperformed the global market but consumer sales are still poor.
As usual, IDC and Gartner agreed on the broad strokes but disagreed on the details: IDC said the U.S. contracted only slightly, whereas Gartner concluded U.S. shipments actually increased 3.5%. Shipments were very poor in the Asia/Pacific region, excluding Japan, and throughout Europe.
[ PCs are still essential to most small and mid-size businesses. Read Are PCs Dead? Not For SMBs. ]
Both firms suggested inventory refreshes and enterprise sales drove U.S. shipments -- so don't take the relatively healthy numbers as evidence of a consumer rebound. Consumer PC sales are typically high during third-quarter "back to school" promotions, but Gartner analyst Mikako Kiagawa said in a statement that third-quarter sales were at their lowest since 2008.
2. Lenovo is the PC market's clear winner.
Lenovo not only remained the world's top PC maker, with around 17.5% of all units shipped, but also enjoyed a bigger year-over-year increase in shipment volume than any of its competitors. Lenovo placed fourth in the United States -- behind HP, Dell and Apple -- but nonetheless made gains. It snared 10.5% of the market, up from around 8.5% from a year ago and within striking distance of third-place Apple.
3. HP and Dell earned qualified wins.
HP ranked second worldwide and first in the U.S., and it increased its market share in both categories. Dell ranked third worldwide and second in the U.S., increased its worldwide market share, and -- depending on whether you trust IDC or Gartner -- was either slightly up or flat in U.S. market share. Both HP and Dell shipped slightly more units than they did the year before. All in all, it's an encouraging showing, given the overall market conditions.
But both companies face concerns. Neither has established itself as a strong mobile brand. Both are still adjusting, as HP CEO Meg Whitman alluded this week, to the PC slump's ripple effects: Microsoft now competes with its own OEMs via its Surface line; Dell and HP can no longer support their device businesses via Windows alone and are turning toward Android and Chrome OS; and so on. HP's and Dell's third-quarter success also deserves an asterisk because both relied to some extent on low-margin hardware, which doesn't really help the bottom line.
4. Enterprises still need PCs.
Windows XP will lose service in April but still ran on more than 30% of the world's PC's in September. Microsoft COO Kevin Turner said last month at the company's meeting for financial analysts that 21% of Microsoft's corporate customers were still using the operating system. Analysts have said for months that XP's retirement could help PC sales, with XP holdouts buying new machines as they move to Windows 7 or Windows 8. Both IDC and Gartner saw evidence of this trend in Q3.
Consumers have moved aggressively toward tablets, and slates are carving out roles in the workplace as well -- but the data is a reminder that many businesses continue to rely on PCs. Nonetheless, neither IDC nor Gartner project that modest enterprise sales will stop the PC slump, which both firms expect will continue into 2014.