%APPDATA%
| Per-user application-specific files
%LOCALAPPDATA%
| User-specific and computer-specific application settings
%ProgramFiles%
| Program files directory
%ProgramFiles(x86)%
| Program files directory for 32-bit applications (64-bit systems only)
%ProgramW6432%
| Program files directory for 64-bit applications (64-bit systems only)
%UserProfile%
| current user's profile directory
%SystemRoot%
| Windows directory [works only on NT based OS (NT3.1+)]
%windir%
| Windows directory [works on NT based OS (NT3.1+) and MS-DOS based OS (Win 95/98/Me)]
See Wikipedia:Special_folder#List_of_special_folders and Wikipedia:Environment_variable#Microsoft_Windows