Acer and ASUS have together snapped up large portions of the western European computer market in the first part of the year, Gartner found in a breakdown of PC sales. Acer managed to hold the top spot in the continent in the first quarter of 2010 with 23.4 percent. Its frequent Taiwanese rival ASUS successfully pushed itself into fourth place through a major spike in market share from just 4.8 percent a year earlier to 7.9 percent today.