Microsoft’s PC Health Client Scheduling Application. Windows Millennium Edition only. PCHSCHD collects data hardware and software configuration data through WINMGMT. This information is used by the Windows ME Help & Support system accessible via "Start \ Help". The information collected by PCHealth is stored in the C:\Windows\PCHealth\HELPCTR\DataColl folder. PCHSCHD runs at startup on most WinME PCs, and subsequently every 10 minutes through Scheduled Tasks.
The Windows 32-bit Message Server. This essential program normally never appears in the Task List unless it has "hung"; it otherwise runs invisibly in the background performing a variety of essential services, a significant majority of which being to do with on-screen messages and notifications.