Update 2021.02.09: On February 9, 2021, we released the February 2021 SSU for Windows 10, versions 1909, 1809, 1607 and 1507. We are planning to switch over to the new combined package format for these earlier versions in the coming months. In some cases, a specific version of the SSU must already be installed in order to install the latest LCU. If the device in question does not have the required SSU already installed, the LCU will fail to install.”]