Win16 on Win32 (WOW) environment
Win16 on Win 32 WOW
The Win32 subsystem is the native environment of Windows 2000. It processes all 32-bit applications. It provides text window support, shutdown, and hard-error handling for all subsystems. Applications created for Windows NT, Windows 95, and Windows 98 are also run on the Win32 subsystem.
To use 64-bit specific applications, you must purchase both a 64-bit processor and a 64-bit version of Windows. 64-bit applications will not run on 32-bit versions of Windows, even if a 64-bit capable processor is installed. You also cannot install a 64-bit version of Windows on a 32-bit only processor.
Yes.
Windows XP Professional x64 Edition
Microsoft Windows XP 64 Bit Edition ?
C:\Program Files (x86)\ is the default folder for 32-bit applications on 64-bit Windows.
Only Windows 64-bit operating systems can run 64-bit applications
No special action is needed. 32-bit applications are run transparently.
I doubt there's any way to really quantify "worst." Windows NT running on non-Intel architectures could only run certain MS-DOS programs under emulation, and 64-bit versions Windows XP/Vista/7 cannot run 16-bit applications at all. 32-bit versions of Windows Vista and 7 can run 16-bit Windows applications, but MS-DOS programs are limited to text mode.
You can't install C++ programs on Windows 7. The compatibility issue is due to turbo software not due to Windows 7. Turbo C does not work on Windows 7 because Turbo C is 16 bit application where Windows 7 does not support 16 bit applications. But there's a tool which allows users to install 16 bit applications on Windows 7. The tool is DOSBox. Use DOSBox to install Turbo C in Windows 7.
In Windows, support files are typically located in the "C:\Windows\System32" directory, which contains essential system files and utilities. Additionally, specific application support files can often be found in the "C:\Program Files" or "C:\Program Files (x86)" directories, depending on whether they are 64-bit or 32-bit applications. User-specific support files may also reside in the "C:\Users[YourUsername]\AppData" folder.