Microsoft has said it is “pleased” with the “strong consumer demand” for its new Windows 7 operating system.
The new operating system was rolled out worldwide on 22 October.
Windows 7 was not included in its results from July to September, for which it reported net profits of $3.57bn (£2.18bn), down 18% from 2008.
The computers came with Vista installed on them, but customers were told they would receive upgrades to Windows 7 when the new system was launched.
Microsoft deferred the revenue from the sales of those Vista systems. If it had not done so, revenue would only have declined by 4%.
The results were still better than had been expected.
Microsoft said reducing costs had helped it to cope with “tough overall economic conditions”.