IT FAQs

Processes in Windows XP


Windows XP runs numerous processes. To view them, open Task Manager and go to the Process tab. While several of these processes are self-explanatory, the majority of them are not.

Here's a short description of some XP processes:
  • Csrss.exe: The Client Server Runtime Subsystem process, also known as the Win32 subsystem, generates a worker thread for client requests.
  • Explorer.exe: This process is the user interface/default Windows shell.
  • Iexplorer.exe: This process is the built-in Web browser.
  • Inetinfo.exe: The Internet Information Services (IIS) process is Microsoft's Web server.
  • Lsass.exe: The Local Security Authentication Server process receives authentication requests from Winlogon and calls the appropriate authentication package.
  • Mdm.exe: The Machine Debug Manager is a support process for debugging.
  • Msmsgs.exe: The Microsoft Windows Messenger process is the built-in instant messaging application.
  • Services.exe: The Service Control Manager process is responsible for starting, stopping, and interacting with system services.
  • Smss.exe: The Session Manager Subsystem is the first user mode process that's created. It's responsible for the initial launch of other subsystem processes.
  • Svchost.exe: This is a placeholder process, or Service Host, where all DLL-based services execute.
  • System: The System process contains the majority of the kernel-mode system threads.
  • System Idle Process: This process runs when no other process is executing.
  • Winlogon.exe: The logon process handles interactive user logons and logoffs.

This list includes processes that are found on most computers, but it's not exhaustive.


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