https://www.theguardian.com/technology/2018/may/04/windows-10-april-2018-update-bug-locks-machines-running-chrome-cortana

Microsoft working on fix for machines and suggests temporary solutions to bug caused by installation of April 2018 update

The new Windows 10 April 2018 update is causing apps such as Google’s Chrome browser and even Microsoft’s own Cortana virtual assistant to freeze and lock up computers.