Don't know if it's relevent but there have been a few reports of the Asus P6x58D motherboard losing BIOS settings - including the clock - when the PC is powered off at the PSU (as opposed to just Shutdown or switched off at the front). It's not happened to everyone and in some cases, the problem appeared out of the blue. If that applies to Dene76, the latest version of BIOS - 1306 - seems to have cured the problem (as long as they performed a CMOS reset after installing the update). No information on the root cause of the problem but my money's on a conflict with some element of W7's ACPI handling.
Can you please updated us on how you're getting along? If you're unsure on how to perform a BIOS update then feel free to contact our Tech Support on 0844 499 4000. It's a straight forward procedure and will only take a few minutes.
If it fails, we will then be able to send a CMOS Battery via Royal Mail.
Problem solved.
I rang PCS and Mustafa changed some settings in the BIOS which were not right [I don't know how they got like that :-( but it is all solved now.
Random reset-to-defaults were being reported on a couple of Asus motherboards - not many cases but all with the same problem. On the threads I followed on the Asus forums, those who updated the threads say that the latest BIOS releases resolved the issue.
I have replaced the battery but I still get the same issue on START UP, time and sate reset to 00:00 01/01/2002.
However, if I make the necessary changes and restart, then everything is fine.