nvda_2013.1.exe --install

Usage: nvda_noUIAccess.exe [options]

Options:
  -h, --help            show this help message and exit
  -q, --quit            Quit already running copy of NVDA
  -r, --replace         Quit already running copy of NVDA and start this one
  -k, --check-running   Report whether NVDA is running via the exit code; 0 if
                        running, 1 if not running
  -f LOGFILENAME, --log-file=LOGFILENAME
                        The file where log messages should be written to
  -l LOGLEVEL, --log-level=LOGLEVEL
                        The lowest level of message logged (debug 10, info 20,
                        warning 30, error 40, critical 50), default is warning
  -c CONFIGPATH, --config-path=CONFIGPATH
                        The path where all settings for NVDA are stored
  -m, --minimal         No sounds, no interface, no start message etc
  -s, --secure          Secure mode (disable Python console)
  --no-sr-flag          Don't change the global system screen reader flag
  --install             Silently installs NVDA
  --launcher            Started from the launcher

Silent Uninstall:  uninstall.exe /S

Run from either "C:\Program Files\NVDA" on 32 bit systems or "C:\Program Files (x86)\NVDA" on 64 bit systems.