A problem with my NIC (I think)

[Initiator]

I have a problem, probably with my NIC.
In general, the problem is that I DC from the Internet about every 1 sec to 5 min.

A little more in-depth:
I've got an ISR with 3 PCs connected through Ethernet. (Cable)
Now, Only 1 PC have this problem.
The ISR is constantly connected to the ISP and my connection to the ISR is intercepted.
I have no idea why that happens but i have a few ways to reconnect:

1. Restart the PC - works 1/2 of the times.
2. Disable & then Enable The NIC - works 1/2 of the times.
3. Repair the NIC using Microsoft Repair function - works 1/10 of times.

Symptom Description:
Some times, the PC is DC-ed (disconnected) from the ISR as soon as my PC is up & running.
sometimes the PC is DC-ed after 1 or 2 minutes.
And VERY rarely it takes 30 minutes till the DC..

I'm really tired of this, any 1 knows what might possibly be reason for that DC problem?
Thanks in advance.

-----------------------------------
DC - Disconnect
NIC - Network Interface Card
ISR - Integrated Services Router
ISP - Internet Service Provider

Edit: Oh, By the way, The Connection is ICMP Flooded as well.

 

[donkey42]

assuming you've tested stuff like cables and reseated NIC tbh you are best starting to test your firewall & possibly move system to DMZ if you have one

test your firewall with some free / shareware here

if your firewall checks out ok, perhaps a new NIC may be the answer

BTW: what OS on misbehaving system ?

 

[Initiator]

Well.. the OS was XP Pro SP3 but while tring to fix the prob, my HDD died so i needed to buy a new one (Drive C was the one to die). so I needed to install a new OS, so I'm trying the Win7RC at the moment..
I'll post ere again if the prob is not solved. if i'll figur it out i'll post as well..
10x.