From HowToGeek

Application Host Helper Service (AppHostSvc) allows IIS (Internet Information Services) configuration history and application pool SID (security identifier) mapping

Contents 1 Overview 2 System Requirements 3 Related How-To Geek Articles 4 See Also 5 References

Overview

System Requirements

Related How-To Geek Articles

See Also

References

http://technet2.microsoft.com/

List of Windows Components v
Features	Windows Aero - System Restore - Previous Versions - SuperFetch - User Account Control (UAC) - Offline Files - ReadyDrive - Instant Search - Windows Sidebar - Parental Controls - Speech Recognition - ClearType - DirectX 10 - ReadyBoost - BitLocker - Flip3D - Remote Desktop - Search Folders - Tablet PC - Windows SideShow
Services	Task Scheduler - Desktop Window Manager - Application Experience - Application Host Helper Service - Application Information - Application Layer Gateway Service - Application Management - Background Intelligent Transfer Service - Base Filtering Engine - Block Level Backup Engine Service - Certificate Propagation - COM+ Event System - Computer Browser - DHCPClient
Applications	Notepad - Windows Mail - Internet Explorer - Command Prompt (Cmd.exe) - Windows Calendar - Mobility Center - Task Manager - Photo Gallery - Windows Media Center - Windows Media Player - Wordpad - Windows Sidebar - Snipping Tool - Windows Contacts - Device Manager - Disk Defragmenter - Event Viewer - Fax and Scan - Windows Journal - Windows Meeting Space - Windows DVD Maker - Windows Easy Transfer
Security	User Account Control (UAC) - Windows Defender - Windows Firewall
Admin Tools	Control Panel - Device Manager - Microsoft Management Console (MMC)