The comment were made two weeks after Microsoft released the upgrade to its ubiquitous Windows operating system with believe that consumers would move to Vista faster than they did to past Windows upgrades.

Investor optimism about Windows Vista has helped push the company's shares up 30 percent since last June, although the stock has dipped in recent weeks.

Microsoft shares were down some 75 cents, or 2.4 percent, at $28.70 in heavy Nasdaq trade.

By: DocMemory
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