Otellini said during an earnings call for the chipmaker's first-quarter financial results that Windows Vista Service Pack 1 will probably arrive "in the October-November time frame".
Microsoft has not yet disclosed its official launch schedule for Service Pack 1 and is saying only that the software will be released in the second half of this year.
Service Pack 1 essentially bundles all the existing patches and updates that Microsoft has issued so far. Unlike Service Pack 2 for Windows XP, the software will not introduce any major changes.
The Service Pack release signals that the software has reached a certain level of maturity, however, and will encourage businesses to start adopting the platform.
Otellini has previously said that Intel will not switch to Vista until after the Service Pack 1 release, and expects other companies to do the same.
He repeated these views in the earnings call, but for the first time added the expected October-November release date.
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