Windows 10 officially launched on Wednesday, beginning its rollout to millions of PCs around the world. In the weeks leading up to the launch, Microsoft actively invited owners of Windows 7 and 8.1 PCs to 'reserve' a copy of the new OS in advance of its rollout, promising to notify them when their PCs were ready to upgrade.
Microsoft revealed earlier today that, in the first 24 hours of availability, 14 million PCs were upgraded to Windows 10, and it looks like that number may have climbed quickly since then to around 67 million. These are impressive figures - but given that there are hundreds of millions of PCs running Windows 7 and 8.1, there's clearly a long way to go.
Microsoft has already said that it's delivering upgrade notifications 'in waves', rather than allowing everyone to upgrade at once, in an effort to ensure a smooth upgrade for all users. But how long will this process take? Microsoft UK says that some users who have already reserved their copies of Windows 10 will be waiting weeks to upgrade.
The company advised users to look out for the notification "over the coming days & weeks", which suggests that some users will be waiting quite a while longer to upgrade to Windows 10. In further tweets, Microsoft reiterated that this is a 'phased' rollout, but said that it can't offer any more specific estimates regarding delivery.