Shipments crossed 90 million units and saw the strongest quarter-on-quarter growth rate for seven years.
Rival analyst firm Forrester recently declared that the downturn in IT spending over the last couple of years was, "officially over". The aggressive marketing strategies from companies such as HP and Toshiba during Christmas helped regain consumers.
HP retained its top position, ahead of Acer and Dell, in worldwide PC shipments in the fourth quarter of 2009. HP's strong performance in the US made it regain its top spot from Dell.
Growth in the consumer market was driven by rapid adoption of notebooks and netbooks, as people looked for low-cost computing.
Figures from another analyst firm, IDC, also revealed signs of recovery in the PC market. PC sales during the October to December period jumped 15.2 per cent, prompting the firm to agree with Gartner and Forrester in declaring the worst is over for the tech industry.