How to Think About Windows Session Isolation — Session 0, RDP, and Running Multiple Users Concurrently (archived 2026-07-27)

This article untangles the concept of a Windows "session," a topic that consistently confuses Windows app developers. It covers why Session 0 isolation exists (and why services can't show UI), how sessions behave over RDP connections, per-session namespaces for named objects, and the design mistakes that commonly show up on shared PCs and RDS environments. Archived version of https://comcomponent.com/en/blog/windows-session-rdp-multiuser-guide/, as published on 2026-07-27. The live article is maintained and may change after this date. First published 2026-07-04.