Taiwan-based Acer Inc. has trimmed down its expectations in the PC market this year after an optimistic forecast earlier this year expecting more than 40 percent growth. The company that recently overtook Lenovo Group Ltd. in the first quarter to claim the No. 3 spot for the number of personal computers sold, blamed Microsoft for failing to trigger a demand upsurge for its latest operating system, Windows Vista.

"It needs more time for consumers to adopt Vista," Acer's chairman JT Wang said after the company's annual shareholders’ meeting Thursday. "I am still optimistic about our shipment growth, but I was even more so before."
The PC vendor still expects its sales to grow 30 40 percent this year. Compared with the first quarter, the company's second-quarter to June sales are expected to come in flat, Wang was quoted as saying.