From Windows Team Blog last week:
“Today we reported our third quarter earnings for the period ending March 31st, 2010 with a record $14.5 billion in revenue. You can read our earnings results here. Windows 7 continues to be a growth driver for Microsoft and people continue to be excited about Windows 7. How excited? Exactly 6 months after the launch on October 22, 2009, we’ve sold well over 100 million licenses of Windows 7. To put that in context, more than 10% of all PCs worldwide are already running Windows 7 today. That’s amazing!”
More information and source here.