tried to do as you suggest (Remove the CMOS battery and leave the system without it for about an hour) but nothing changed.
By the way we have tried to analyze a crash log dump (with previous installation of Windows 7) using the Windows Driver Kit (WDK) and the result is a problem with ntoskernel.exe.
We have also tried to install WDK in Windows 8 installation and, analyzing the memory log dump, we got this result
Nome registro: System
Origine:
Microsoft-Windows-WER-SystemErrorReporting
Data: 28/06/2013 12.49.09
ID evento: 1001
Categoria attività:Nessuna
Livello: Errore
Parole chiave: Classico
Utente: N/D
Computer: fbwks025
Descrizione:
Il computer è stato riavviato da un controllo errori. Controllo errori:
0x00000019 (0x0000000000000003, 0xfffffa801db7c8f0, 0xeffffa801db7c8f0,
0xfffffa801db7c8f0). I dettagli sono stati salvati in: C:\Windows\MEMORY.DMP.
ID segnalazione: .
XML evento:
<Event
xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider
Name="Microsoft-Windows-WER-SystemErrorReporting"
Guid="{ABCE23E7-DE45-4366-8631-84FA6C525952}"
EventSourceName="BugCheck" />
<EventID Qualifiers="16384">1001</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x80000000000000</Keywords>
<TimeCreated
SystemTime="2013-06-28T10:49:09.000000000Z" />
<EventRecordID>1358</EventRecordID>
<Correlation />
<Execution
ProcessID="0" ThreadID="0" />
<Channel>System</Channel>
<Computer>fbwks025</Computer>
<Security />
</System>
<EventData>
<Data
Name="param1">0x00000019 (0x0000000000000003, 0xfffffa801db7c8f0,
0xeffffa801db7c8f0, 0xfffffa801db7c8f0)</Data>
<Data
Name="param2">C:\Windows\MEMORY.DMP</Data>
<Data
Name="param3">
</Data>
</EventData>
</Event>