Strangely, the last recorded BSOD was in November.
I'm seeing some strange errors:
Code:
Event[74]:
Log Name: Application
Source: AvDiagnostics
Date: 2011-01-10T18:30:20.000
Event ID: 0
Task: N/A
Level: Error
Opcode: Info
Keyword: Classic
User: N/A
User Name: N/A
Computer: MNL-AROMANA-1.datacom.com.au
Description:
[Sink UploadLogger (Logger)]
BITS error for job file 445fd849131e0e30.avlog: HTTP status 407: Proxy authentication is required.
The only thing I can suspect is Trend Micro. Try removing it, and replace it with MSE:
http://www.microsoft.com/security_essentials
Your Realtek network drivers are old, dated from January 2010. Install these ones:
Realtek
Also, update your Atheros wireless drivers:
HP ProBook 4420s Notebook PC*-* Atheros Wireless LAN Driver - HP Business Support Center
Run driver verifier:
Driver Verifier - Enable and Disable