Microsoft is set to share details June 24 on the biggest update to its Windows operating system in years.

Why it matters: Both Chromebook and Apple's Macintosh have gained ground in recent years as Microsoft has made only modest updates to Windows 10.

Driving the news:

• The event will be an online one, featuring CEO Satya Nadella and product chief Panos Panay.
• Nadella teased the new version at last week's Build conference and in an Axios interview, but offered no details.

More details to come.

Correction: An earlier version headline mistakenly said the event was July 24.