function InitializeSetup: Boolean;
var
  FileName: string;
begin
  try
    if IsProcessorFeaturePresent(PF_XMMI64_INSTRUCTIONS_AVAILABLE) <> 0 then
    begin
      Result := True;
      {Version 3.3.x or below}
      if RegQueryStringValue(HKEY_LOCAL_MACHINE, 'SYSTEM\CurrentControlSet\Services\vvramd', 'ImagePath', FileName) then
      begin
        MsgBox('Found an older version in ' + ExtractFileDir(FileName) + DoubleCrLf +
          'You must uninstall it before you install this update. Please do the following: ' + DoubleCrLf +
          '* Backup your configuration to a XML file.' + CrLf +
          '* Uninstall the currently installed version.' + CrLf +
          '* Restart the computer and launch this installer again.', mbInformation, MB_OK);
        Result := False;
      end;
      {Version 3.4 or above}
      if RegQueryStringValue(HKEY_LOCAL_MACHINE, 'SYSTEM\CurrentControlSet\Services\SPVVEngine', 'ImagePath', FileName) then
      begin
        MsgBox('Found an older version of the RAM Disk installed on your computer. ' + DoubleCrLf +
          'You must uninstall it before you install this update. Please do the following: ' + DoubleCrLf +
          '* Backup your configuration to a XML file.' + CrLf +
          '* Uninstall the currently installed version.' + CrLf +
          '* Restart the computer and launch this installer again.', mbInformation, MB_OK);
        Result := False;
      end;
      {Check if CCleaner is installed}
      if RegKeyExists(HKEY_LOCAL_MACHINE, 'SOFTWARE\Piriform\CCleaner') then
      begin
        MsgBox('The installer has found CCleaner on your computer. ' + DoubleCrLf +
          'There are known issues with CCleaner and the RAM Disk software. ' + DoubleCrLf +
          'Do not use image files or image-based RAM disks as they may be corrupted. Volatile RAM disks are NOT affected and can be used freely.', mbInformation, MB_OK);
      end;
    end
    else
      RaiseException('No SSE2 detected');
  except
    MsgBox('Your computer does not support the SSE2 instruction set.', mbError, MB_OK);
    Result := False;
  end;
end;