Microsoft\u2019s new Windows Vista OS won\u2019t boost PC sales very much this year because operating systems usually face slow, gradual adoption, the head of Taiwan Semiconductor Manufacturing said Thursday.TSMC, the world\u2019s largest contract chip maker, believes PC sales growth in 2007 will be similar to last year, despite the hype surrounding the launch of Vista. The company is considered an IT industry bellwether due to the wide variety of chips it manufactures. TSMC also does its own market research in order to decide how much it should spend on new factories.Enterprise users are normally slower to adopt new operating systems, said Rick Tsai, president and chief executive officer of TSMC. His company will be no exception, as it will not be an early Vista adopter, he said. Consumers are more likely to buy a new OS like Vista in the early days after its launch, he added.The Vista issue was raised after TSMC executives said the global chip industry is suffering amid a glut in mobile phone and PC chips. TSMC reported its worst quarterly net profit in a year and a half on Thursday, as the chip glut worsened and orders fell.The current quarter, January to March, will be even worse, TSMC executives said, but it will mark the bottom of the chip industry downturn. TSMC\u2019s fourth-quarter net profit dropped 18 percent compared to the same time a year earlier, to new Taiwanese $27.91 billion (US$856.7 million as of Dec. 31, the last day of the period reported). It was the chip maker\u2019s worst performance since the third quarter of 2005, when its net profit hit NT$24.49 billion.-Dan Nystedt, IDG News Service (Taipei Bureau)Related Link:\n\nMicrosoft Windows Vista: The OS Has LandedCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.