


As this file is a replica of the original media, it can then be written (burned) to another DVD or USB key in the same way it was created. Why you should download an ISO imageĪn ISO image is a sector-by-sector copy of a DVD or other media stored in a single file.

However, if you plan on upgrading to the new version of Windows it is always recommended that you download or create an ISO to have on hand for troubleshooting problems or performing clean installs of Windows. Windows 10 21H2 is not a very large feature update and only contains a few new features for business users and increased protection against WiFi side-channel attacks. Microsoft released Windows 10 21H2, the November 2021 Update, last week and you can now download an ISO image for the new version to put aside for emergencies or clean installs.
