Ready, set, go! With Windows 10 about to hit computers everywhere, here's how the rollout of Microsoft's latest operating system will work, according to the company.

To manage demand, Microsoft says it will do a phased rollout of the new OS. Windows Insiders, regular folks taking Windows 10 for a trial run, will be the first to get it. From there, Microsoft will start notifying people who reserved Windows 10, slowly scaling up after July 29. Microsoft isn't commenting on how long the rollout will take.

Microsoft has already downloaded the files needed to install the Windows 10 upgrade to some people who reserved their copy ahead of time. So the files you need to install the new OS might be hanging out on your computer right now. Otherwise you should get them soon.

You won't be able to install the Windows 10 upgrade, however, until you get the word from Microsoft. The company will begin rolling out the installations at midnight tonight. (Check out these 6 reasons to upgrade to Windows 10.)

As the Windows 10 upgrade rollout continues, a Microsoft spokesperson says, the company will “listen, learn, and update the experience for all Windows 10 customers.”

Reserve your free copy of Windows 10.

Copyright © 2005-2015 Consumers Union of U.S., Inc. No reproduction, in whole or in part, without written permission. Consumer Reports has no relationship with any advertisers on this site.