[NumLock]

можно:

Код:

var
  si: STARTUPINFO;
  pi: PROCESS_INFORMATION;
begin
  ZeroMemory(@si, SizeOf(STARTUPINFO));
  si.cb:=SizeOf(STARTUPINFO);
  si.dwFlags:=STARTF_USESHOWWINDOW;
  si.wShowWindow:=SW_HIDE;
  if not CreateProcess(nil, 'cmd /c "полный путь\file.msi"', nil, nil, False, 0, nil, nil, si, pi) then RaiseLastOSError;
  WaitForSingleObject(pi.hProcess, INFINITE);
  CloseHandle(pi.hThread);
  CloseHandle(pi.hProcess);
end;