CISA has mandated Windows PCs be updated by October 7, which is three weeks from now. As ever, the formal mandate applies to federal employees, but many other public and private organizations follow CISA’s mandates, given its remit “to help every organization better manage vulnerabilities and keep pace with threat activity.”

On most of those platforms, Windows App is a replacement for the Microsoft Remote Desktop app, which was used for connecting to a copy of Windows running on a remote computer or server—for some users and IT organizations,