Total worldwide PC shipments are now predicted to reach 135.5 million in 2002, showing growth of just 1.1%, and then to grow by 8.4% in 2003, IDC said.
Those figures compare with IDC's June forecast of 4.7% growth in 2002 and 11.1% in 2003.
In the USA, the forecast is even worse, with 0.5% growth predicted for 2002 and 4.2% for 2003.
The only sectors still spending on PCs are the public sector and small businesses, IDC said. Consumers and medium-sized to large companies continue to postpone spending.
While consumers may begin cautious purchasing later this year, it will be mid-2003 before the business and consumer markets pick up completely, IDC said.
The decline of the stock market has raised the cost of capital, dampening corporate spending. Consumers, meanwhile, are watching the jobs market cautiously, IDC said.
However, Asia-Pacific is the one region that has seen growth, with larger markets like China, Australia and India likely to keep the region's growth above 10% for 2002, IDC said.