Mount the disc image. You will need the utility for mounting disc image files, like WinCDEmu, UltraISO, Alcohol 52%/Alcohol 102% or Daemon Tools Lite
If you're installing the repack - simply click on setup.exe
Install the game
Also it is recommended to install DirectX, PhysX, OpenAL, Microsoft Visual C++ Redistributable 2005 - 2010 and Microsoft .NET Framework
Optionally install NoDVD
Launch the game and play. If the game doesn't run - open the directory with the game and find SawGame.exe. Right click on SawGame.exe - Properties - Compatibility - Set "Run this app in compatibility mode with Windows XP, Windows Vista or Windows 7".
The game has been tested on Windows 7 64-bit, works fine
The game supports Vsync and resolutions like 1366x768 but you will not find the settings in menu. If you can't find desired resolution in Options or want to enable Vsync - setup it manually through .ini-file, for instructions check PCGamingWiki page
If game shows error during launch - try to do next steps: delete the game, delete PhysX, after that install the game again but this time don't install PhysX. Then try to launch the game from desktop shortcut, it should work
Also - it is recommended to update sound card drivers and reduce sound quality to 48000Hz or less (the game has been verified to work at 24 bit, 44100 Hz).