Error on installing ConCrete or ConCrete Plus:
Error 1913: Setup cannot update file C:/windows/win.ini or
Error 1913: Could not update the INI file C:\WINDOWS\SysWOW64\WIN.INI. Verify that the file exists and that you can access it.
Disable your virus scanner (temporary) and run the installer again.
Run the installer again and install the applicaction for all users.