https://www.theverge.com/2018/11/27/18115183/apple-icloud-fix-windows-10-october-update > Apple just updated iCloud for Windows to version 7.8.1 today, which seems to fix compatibility issues users were reporting between iCloud and Windows 10’s October Update, as spotted by 9to5Mac. For the past few weeks, users had been reporting seeing an error message and failed installations if they tried to upgrade iCloud for Windows on a Windows 10 machine running the October patch. Many users who already had iCloud prior to the update have encountered bugs such as trouble with syncing photos. > Microsoft and Apple quickly said they were working on a “compatible version” to fix the issues. Before today’s release, Microsoft had been blocking users from performing the October Update if it detected the older iCloud software installed. Apple also noted on its support page that iCloud for Windows was compatible with Microsoft Windows 7 through Windows 10’s April 2018 update, excluding the latest October Update. That support page has now been revised to reflect that iCloud should work fine on the latest version.