UPDATE 3-Microsoft CEO backs Web spending, "done" with Yahoo

(Adds CFO comment, details on spending)

By Daisuke Wakabayashi

REDMOND, Wash., July 24 (Reuters) - Chief Executive Steve Ballmer on Thursday defended Microsoft Corp's (MSFT.O) need to make heavy investments in its Internet businesses but said the company was "done," for now, with pursuing Yahoo Inc (YHOO.O).

"There's nothing under discussion between the two of us," Ballmer told investors of how six months of various talks had reached an impasse earlier in July.

"We had a set of principles, we talked about them, it didn't work out," he said. "Fine, we're done. We can move on."

The message for Microsoft's annual meeting with Wall Street analysts, an all-day affair at its headquarters in Redmond, Washington, was that it had a post-Yahoo plan to turn around its online services division and a strategy to take advantage of future opportunities, even as its Internet chief departs.

"There is this huge, huge, huge new opportunity around the Internet and online and we have to embrace that opportunity and invest in that opportunity," Ballmer said.

Shares of Microsoft have fallen 8 percent over the last week since the company forecast an outlook below Wall Street estimates and revealed an additional $500 million investment into its online unit, even as it chalked up further losses.

Charles Di Bona, a software research analyst at Sanford C. Bernstein, said Ballmer's comments did not give enough details about how that additional investment will be spent and how the company arrived at that decision.