Please help me: "BSOD ndis.sys BCCODE: d1"

Hi, my name is William. Well, I was bought a new PC, 2 weeks ago. But, the problem is, this PC is always BSOD [lot, tons of times]. I've been fed up and very sad, lately. I already contact the vendor, and replace the mainboard, harddisk, memory but, there is no change to my PC. When I connect to internet, and download something, my PC will crash and have a BSOD.

and this is the error code:

DRIVER IRQL NOT LESS OR EQUAL

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1033

Additional information about the problem:
BCCode: d1
BCP1: 00000006
BCP2: 00000002
BCP3: 00000000
BCP4: 89C3BB9E
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\030611-15812-01.dmp
C:\Users\USER\AppData\Local\Temp\WER-31187-0.sysdata.xml

Read our privacy statement online:
Windows 7 Privacy Statement - Microsoft Windows

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt

and this is the minidump
Documents.rar

I'm using Windows 7 Ultimate x86. I wonder if my OS was the problem. But when I'm sure my NIC was the problem [I replaced it before with the mainboard, because the NIC is onboard] but the BSOD occured again.

I'm sorry if my English is bad. Please help me, I'm very, very sad. This problem is killing me.

William this is indeed a tale of woe.....

I gather your computer is under warranty.
A new computer should not be presenting with the problems you have listed - & we volunteers should not be putting at risk the rights,YOU, the consumer has under that warranty...
I strongly suggest that you should seek further advice asap.
Under Warranty terms a duty of care applies.

under warranty? but i was bought them 2 weeks ago. what do I have to do now? Is it have a connection between BSOD and under warranty?

Will, you said you have had problems with this new PC
Who replaced "the mainboard, harddisk, memory"?
If it is hardware related it SHOULD be covered by your Manufacturers warranty.

I know, but I already replaced it over and over. It's under the shop's warranty. But basically, I want to know what happened to my PC. Or maybe I've been duped by them.

Will - you will need persistence.
Speak with them yet again.
BTW - What exactly are your rights under the terms of the shops warranty?

just a plain 1 year warranty, under shop's
but I will make them give my money back. I've replaced it lot and lots of times. I have a life too to live.

If you paid for a new computer you expect it to be trouble free.
Good luck.
Let us know the results please.

Sure. Please wish me luck. I'll let you know as soon as possible. And thanks for the advice.

You are most welcome.
I hope they do the right thing by you.