To download Windows 11 or to install it on a Windows 10 computer, visit the below link.
https://www.microsoft.com/en-us/software-download/windows11
Below are the SHA256 check sums that can be used to validate the integrity of the ISO file downloaded.
English 64-bit 667BD113A4DEB717BC49251E7BDC9F09C2DB4577481DDFBCE376436BEB9D1D2F
English International 64-bit B117FE6A87E8707FB2E228591F1CFF3C062C08679F2D856D48D01BE5A052BB30
The check sums are available at the Windows 11 download link and are to be used to verify the downloaded ISO file.