Some businesses midway through upgrades to Vista are asking for Windows 7 instead, a Microsoft executive said at Thursday's launch event in London.
"This is the first time that we have had customers talking about slipstreaming the deployment of one OS into another version," said John Curran, who until recently headed the Windows client group in the U.K.
About 15 percent of business computers in the U.K. have Vista installed.
Ten large companies in the U.K. have already begun deploying Windows 7 on a total of 300,000 machines, according to Microsoft.
"In terms of the numbers of seats being deployed at launch, we are well ahead of where we were from a Vista perspective," Curran said.
Read more of "Vista jilted for Windows 7 midway through upgrades" at Silicon.com.