Silent installer prompts to uninstall previous version
Using the VLC installer for Windows if /S is used to install silently and a previous version is already installed, the install will stop at the prompt asking whether to remove the existing version.
To fix in vlc.win32.nsi replace line 837:
MessageBox MB_YESNO|MB_ICONEXCLAMATION $Message_AlreadyInstalled IDNO done
with this
MessageBox MB_YESNO|MB_ICONEXCLAMATION $Message_AlreadyInstalled /SD IDNO IDNO done