A leaked version of Windows 11 is circulating online but downloading and installing it is not recommended and could be risky. Windows 10 users will get Windows 11 as a free upgrade once it is officially released. To get Windows 11 now, users can join the Windows Insider program and check for updates to download the preview version. Checking system requirements like having a 64-bit processor, 4GB RAM, and 64GB storage can determine if a device can run Windows 11.