Windows on Windows
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This article is about the Win16 subsystem in 32-bit Windows NT. For the 32-bit compatibility layer in 64-bit Windows, see WOW64 .
Windows on Windows , commonly referred to as WOW or WoW , is a critical component for backward compatibility of legacy code in Windows NT. WoW supports applications using the Win16 API and relies on NTVDM . 64-bit versions of Windows do not include the 16-bit WoW subsystem or NTVDM and can therefore cannot run 16-bit Windows or DOS applications. Win16 applications run as-is with out preemptive multitasking or Long File Name support. These programs do not take advantage of the 32-bit version of Windows NT
External links and references
Windows components
Core
Aero · ClearType · Desktop Window Manager · DirectX · Windows Explorer · Taskbar · Start menu · Windows Shell (Shell namespace · Special Folders · File associations ) · Windows Search (Saved search , iFilters ) · Graphics Device Interface · Windows Imaging Format · Next Generation TCP/IP stack · .NET Framework · Audio · Printing (XML Paper Specification ) · Windows Script Host (VBScript , JScript ) · COM (OLE , OLE Automation , DCOM , ActiveX , Structured storage )
Applications and tools
Backup and Restore Center · Calculator · Calendar · Character Map · Cmd.exe · Contacts · Control Panel (Applets ) · Device Manager · Disk Cleanup · Disk Defragmenter · DVD Maker · Event Viewer · Fax and Scan · Internet Explorer · Mail · Magnifier · Management Console · Media Center · Meeting Space · Mobile Device Center · Mobility Center · Movie Maker · Narrator · Notepad · Paint · Photo Gallery · PowerShell · Private Character Editor · Problem Reports and Solutions · Remote Assistance · Sidebar · Snipping Tool · Sound Recorder · Sysprep · System Configuration · System File Checker · System Restore · Unix subsystem · Windows Installer · Windows Media Player · Windows Speech Recognition · Task Manager · Windows Update · WordPad · WinSAT
Kernel
Ntoskrnl.exe · hal.dll · System idle process · Svchost.exe · Registry · Windows service · Service Control Manager · WOW /WOW64 · DLL · EXE · NTLDR /Boot Manager · Winlogon · Recovery Console · I/O · WinRE · WinPE · Kernel Patch Protection
Services
AutoPlay · BITS · Task Scheduler · Wireless Zero Configuration · Shadow Copy · Windows Error Reporting · Multimedia Class Scheduler · CLFS
File systems
NTFS (Junction point , Mount Point , Reparse point , Symbolic link , TxF , EFS ) · FAT32 · FAT16 · FAT12 · exFAT · CDFS · UDF · DFS · IFS
Server
Domains · Active Directory · DNS · Group Policy · Roaming user profiles · Distributed Transaction Coordinator · SharePoint Services · Windows Media Services · Rights Management Services · IIS · Terminal Services · WSUS · Network Access Protection · DFS Replication
Architecture
NT series architecture · Object Manager · Startup process (Vista ) · I/O RP · Kernel Transaction Manager · Logical Disk Manager · Security Accounts Manager · Windows Resource Protection · LSASS · CSRSS · SMSS
Security
UAC · BitLocker · Defender · DEP · Protected Media Path · Mandatory Integrity Control · UIPI · Windows Firewall · Security Center
Games
Chess Titans · FreeCell · Hearts · Hold 'Em · InkBall · Mahjong Titans · Minesweeper · Purble Place · Solitaire · Spider Solitaire
PowerToys Tweak UI · SyncToy · PowerCalc
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