Microsoft Chairman Bill Gates on Friday indicated that Windows 7, the next major version of Windows, could come within the next year, far ahead of the development schedule previously indicated by the software maker.

In response to a question about Windows Vista, Gates, speaking before the Inter-American Development Bank here, said: “Sometime in the next year or so we will have a new version.” Referring to Windows 7, the code name for the next full release of Windows client software, Gates said: “I’m super-enthused about what it will do in lots of ways.”

Microsoft set the clock ticking for Yahoo to accept its $41 billion buyout offer in a letter to the Internet pioneer’s board Saturday, warning that if a deal wasn’t reached by April 26 the software maker would launch a hostile takeover at a less attractive price.

“If we have not concluded an agreement within the next three weeks, we will be compelled to take our case directly to your shareholders, including the initiation of a proxy contest to elect an alternative slate of directors for the Yahoo board,” wrote Microsoft Chief Executive Steve Ballmer.

“If we are forced to take an offer directly to your shareholders, that action will have an undesirable impact on the value of your company from our perspective which will be reflected in the terms of our proposal,” he wrote.

A Yahoo spokeswoman declined to comment Saturday.