Google's surprise entry into the browser market, Chrome, has been installed on over two million computers in the US alone - and that's just in the first week.

At Microsoft's 2007 Analyst's Day, Steve Ballmer revealed that the Windows install base will go past the one billion mark in 2008.

An internal document from Microsoft has revealed that there is a workaround that will allow end users to use a Vista Upgrade disc to complete a clean install.

End users buying upgrade versions of Windows Vista will no longer be able to use the disc to install a clean version of the operating system.