http://www.ft.com/cms/s/0/e16eb92c-f617-11dd-a9ed-0000779fd2ac.html

Last month Microsoft warned that the first half of this year at least could see even weaker conditions than the final quarter of last year, when an expected 10-12 per cent increase in the PC market completely evaporated.

Other one-off factors have complicated the outlook and could bring more disruption for the traditional PC industry, analysts say.

evaporate 蒸発させる,〈希望などを〉消失させる

one-off 一度限りの