From Mary Jo Foley's blog:

I predicted Microsoft would hit the 60-million-copies-sold mark with Windows Vista around July 1. On July 26, at its annual Financial Analyst Meeting (FAM), Microsoft officials acknowledged the company has hit that milestone.

At the end of the fist 100 days of sales, at the start of May, Microsoft said it had sold 40 million copies of its client operating system.

With Vista, “We’ve eclipsed the entire Apple installed base in the first five months of sales,” Kevin Turner, Microsoft’s Chief Operating Officer, told attendees of FAM

Full post http://blogs.zdnet.com/microsoft/?p=598.