Microsoft (MSFT, Tech30) said a month ago that Windows 10 would become available on July 29, Microsoft clarified on Thursday that everyone won’t be able to upgrade on that day.

In a blog post, Windows Chief Terry Myerson said that Windows 10 upgrades will first go to “Windows Insiders,” a group of 5 million people who have been testing out a preview version of Windows 10.

“We want to make sure all of you have a great upgrade experience, so we’ll roll-out Windows 10 in phases to help manage the demand,” Myerson said. “We are humbled by your excitement and we can’t wait to deliver Windows 10 to you soon.”

Myerson said the “vast majority of Windows 7 and 8 PCs will be fully compatible with Windows 10. But the company hasn’t finished testing.

You might need to exercise a little bit more patience. But soon you will be able to upgrade your windows 7 or 8 to windows 10 and enjoy it.

Read more at cnn