Microsoft’s Windows 10 Fall Creators Update has arrived, and if you have any previous version of Windows 10, the upgrade is free.

For those with Windows 10, Microsoft recommends “you wait until Windows 10 is automatically offered to your device” via Windows Update, if you’ve opted for automatic updates on your device.

“Once the download is complete and the update is ready to install, we’ll check with you, so you can pick the right time to finish the installation and reboot,” Microsoft says. “We do this so we can ensure the update does not disrupt you, and we use active hours to help suggest a good time.”

If you want Creators Update sooner, check for it manually via Settings > Update & security > Windows Update > Check for updates.

Once it’s installed, you’re ready to go; here’s what to check out. For everyone else: you blew it. As of July 2016, those still on Windows 7 or 8 have to pay up to $200 for Windows 10.

Last month, about 29 percent of worldwide PCs were running Windows 10; Windows 7 is still most popular with 47 percent, according to Net Applications. So there are still quite a few people who have yet to experience Windows 10.

If you’re ready to try it, check if your PC can even run Windows 10 Fall Creators Update. Chances are good that it can; the system requirements are not extremely demanding.

If that’s a go, back up your files. Remember, a new operating system is a non-trivial upgrade, and even though Windows 10 has been tested on millions of PCs already, there’s a chance your particular combination of hardware, drivers, and software could trip up the new OS.

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