Microsoft has revealed that Windows 8 has sold over 100 million licences since launch.
This figure is up from the 60 million announced in January, and includes the number of upgrades from existing Windows licences as well as pre-loaded operating systems sold with packaged PCs, Laptops, and tablets.
"We’ve also seen the number of certified devices for Windows 8 and Window RT grow to 2,400 devices, and we’re seeing more and more touch devices in the mix," said Windows chief marketing and financial officer Tami Reller on an official blog post.
This figure puts Windows 8 slightly behind sales figures for Windows 7, which had reaced the 100 million milestone in just under six months after launch.
The Windows store has also crossed a threshold, with over 250 million apps downloaded, with 90 per cent of the catalogue being downloaded every month.
To Reller, this is a sign of a healthy PC market - in spite of much talk to the contrary.
"The PC is very much alive and increasingly mobile," she said.
"The PC is also part of a much broader device market of tablets and PCs. Windows 8 was built to fully participate in this broader and increasingly mobile device market. The PC part of the market is rapidly evolving to include new convertible devices and amazing new touch laptops, and all-in-ones."