D512 doesn't say anything

[support]

In the case of our drivers are no more accepted by Windows (after a recent Windows auto-update for instance), we will see shortly a lot of complains about this problem, in this forum.

If we receive zero other complain from other users in the coming days, there is a chance that this problem is exclusively with your computer. In that case, it will be very difficult for us to analyse and locate the problem in your system files.

[JohnRichards]

We have had this problem before with Vista 64 bit. After upgrading to any version of 7, no more problems.
John