Windows Crashing/ freezing up

Hi,
I have just put together a system with the following Specs:
* Gigabyte GA MA78GM motherboard
* Phenom 9650
* 1GB x 2 Trancend DDR2
* Samsung PATA HDD + SATA DVD RW
OS: Win XP Pro SP2 [Its restarting too frequently to let me update.]

Windows is restarting randomly.

Some times it freezes up and displays a "Recovering BIOS" at POST menu. [The mobo has a Dual BIOS feature]
Other times it boots up normally and Windows shows me a "recovers from error" message. [Pic attached]

The funny thing is this happens when the system is not under load. When I am surfing etc.

Its not a temperature problem. The temps stay well low. I have tried re-seating the ram etc, nothing works. I will put it under stress test and post the results soon.

It was working fine yesterday.
I noticed this problem cropped up ever since I started using the onboard LAN [and installed the driver.] Now that I think of it, the system crashes mostly when I am surfing.

It took me 3 attempts to post this.

I have attached no other peripherals/ cards.

Why not try & use the PC for a few hours with the LAN card removed? Also, after removing try cleaning the LAN card contacts with an eraser. Delete the existing LAN drivers & let Windows install the default ones again.

Great suggestion.
I have uninstalled the LAN drivers.
The issue Seems to have resolved.

So far i have run the stress test for half an hour.
Systems been as stable as a rock.

Does any one know any alternate drivers for the onboard lan card? I really need to access the internet.

This gprs surfing is getting very expensive

===== EDIT =======
Ok, I found the signed drivers on the Gigabyte CD itself. The frequency of crashes have reduced but they still occur.

Should I switch to a seperate LAN card?