Vista updates to post Tuesday, says Amazon

updated 9:22 p.m. ET March 17, 2008

SEATTLE - A major package of updates and security fixes for Microsoft Corp.'s Windows Vista operating system will be available for download Tuesday, according to Amazon.com Inc.'s Web site.

(MSNBC is a joint Microsoft - NBC Universal venture.)

The retailer is selling copies of Vista without the service pack and advising customers that they can download the free SP1 upgrade starting Tuesday.

Amazon is also taking pre-orders for boxed copies of Windows Vista Service Pack 1, which it said it will start shipping Wednesday.

In an e-mailed statement, Microsoft said it is on track to release SP1 in mid-March. The software maker acknowledged Amazon's claim that the upgrade would be available Tuesday online, but didn't confirm the date.

Microsoft previously announced plans to post SP1 to its Windows Update site and to its download center in mid-March, then push out the upgrades in mid-April to computer users who have set their PCs to receive automatic updates.

Many of the fixes in Vista SP1 have already been released as part of regular monthly updates in the year since the operating system went on sale to consumers. Microsoft has said SP1 improves Vista's reliability, security and performance. Some early testers of the service pack have noticed improvement in performance when copying files over a network and playing video games that weren't designed for Vista.

So far, the software maker has determined that only a handful of programs will break down in some way after SP1 is installed.

Microsoft said SP1 will block several applications from running for "reliability reasons." The list includes BitDefender Antivirus and Internet Security, version 10; Fujitsu's Shock Sensor hard drive protection for rugged laptops; two versions of Jiangmin KV Antivirus software and Check Point Technologies' Zone Alarm Security Suite.

The company said a few programs will not run on SP1, such as Web application design program Iron Speed Designer, while others will stop working well, like The New York Times Reader application.

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