1. Press ⊞Win + R or open search and type winver in the opened dialog.
2. The opened "About Windows" window displays the version and build number.
Windows 10 RTM versions history
- Windows 10 version 2004 (May 2020 Update)
- Windows 10 version 1909 (November 2019 Update)
- Windows 10 version 1903 (May 2019 Update)
- Windows 10 version 1809 (October 2018 Update)
- Windows 10 version 1803 (April 2018 Update)
- Windows 10 version 1709 (Fall Creators Update)
- Windows 10 version 1703 (Creators Update)
- Windows 10 version 1607 (Anniversary Update)
- Windows 10 version 1511 (November Update)
- Windows 10 version 1507
Other info
If you wish to install a specific Windows 10 version you can download the desired Windows 10 version .iso from here and install it without a internet connection present. To prevent upgrading to a newer version see this guide.