Unfortunately, ARCHOS has removed the present release from its server, along with several other versions. However, you can still download a newer firmware compatible with the same device: download ARCHOS GamePad 2 Firmware 20140213.175138.
It is highly recommended to always use the most recent driver version available.
Try to set a system restore point before installing a device driver. This will help if you installed an incorrect or mismatched driver. Problems can arise when your hardware device is too old or not supported any longer.