Microsoft announced Office 2007 has been delayed from October to the end of the year.
Microsoft also said it would delay the general availability of the Office upgrade to early 2007 from its previous January target.
The delay of the 2007 Microsoft Office package, which includes the Word processor, Excel spreadsheet and PowerPoint presentation software, marks the latest slip-up at Microsoft, which has been plagued by a series of postponements.
Microsoft had already pushed back the consumer launch of Office in March to coincide with the delayed debut of its Windows Vista operating system. It postponed the release of its much-anticipated upgrade to Windows until after the crucial holiday shopping season to improve the system's quality.