Unexpected Restarts

Hi Guys,

I was hoping someone could shed some light on a problem I have been experiencing for the last 10 days.

My WIN 7 x64 PC keeps restarting itself every night at 12:13:14 AM for no apparent reason. I have no scheduled tasks that could be triggering this. It appears to be a fairly graceful restart.

I have completed multiple malware/anti virus scans (Kaspersky, FSecure) to name a few. Downloaded some rootkits which yielded nothing, created a new Admin profile and disabled the old one, yet still it is restarting itself.

Any ideas would be greatly appreciated!

Information below,

Thanks guys & gals!


Event Viewer Reads:

GENERAL TAB:
The process C:Windowssystem32shutdown.exe (**PCNAME**) has initiated the restart of computer **PCNAME** on behalf of user NT AUTHORITYNETWORK SERVICE for the following reason: No title for this reason could be found
 Reason Code: 0x800000ff
 Shutdown Type: restart
 Comment:

DETAILS TAB:

- System

  - Provider

   [ Name]  USER32
 
  - EventID 1074

   [ Qualifiers]  32768
 
   Level 4
 
   Task 0
 
   Keywords 0x80000000000000
 
  - TimeCreated

   [ SystemTime]  2014-02-08T13:13:14.000000000Z
 
   EventRecordID 424139
 
   Channel System
 
   Computer **PCNAME**
 
  - Security

   [ UserID]  S-1-5-20
 

- EventData

   C:\Windows\system32\shutdown.exe **PCNAME**)
   **PCNAME**
   No title for this reason could be found
   0x800000ff
   restart
   
   NT AUTHORITY\NETWORK SERVICE
   FF000080000000000000000000000000000000000000000000000000000000000000000000000000


--------------------------------------------------------------------------------

Binary data:


In Words

0000: 800000FF 00000000 00000000 00000000
0008: 00000000 00000000 00000000 00000000
0010: 00000000 00000000  


In Bytes

0000: FF 00 00 80 00 00 00 00   ÿ..¿....
0008: 00 00 00 00 00 00 00 00   ........
0010: 00 00 00 00 00 00 00 00   ........
0018: 00 00 00 00 00 00 00 00   ........
0020: 00 00 00 00 00 00 00 00   ........