Microsoft has decided to make its final update to Windows 2000 largely a collection of previously released fixes rather than an all-new service pack. he company said that by going with a collection of updates, rather than a service pack, it would be enabling customers to update their machines more quickly. The release of the "update rollup" will be in the middle of next year, Microsoft said in a posting to its website. "Because Microsoft believes the Update Rollup will meet the needs of customers better than a new service pack, there will be no Service Pack 5 (SP5) for Windows 2000," the software maker said. "Therefore, SP4 becomes the final service pack for Windows 2000."