All the files that I download get corrupted.

Okay so this is my problem.

For a while I have been having some issues when it comes to downloading random stuff (say for instance drivers from Nvidia, to games, tv shows, movies, you name it.) when I download an ISO file, its corrupt and can't be mounted on any virtual CD/DVD Rom, when its a RAR file, it cant be extracted as it gives a CRC Error message saying that the volume is corrupt, same thing happens with EXE files.

The only way I have found that fixes the corrupted files is re-downloading the whole file again (if it is a RAR, just downloading the part that is corrupted.). However, I'm really getting ticked off at this problem; because I can't basically download anything without having to re-download countless times to see if this time I get the file right.

I have done some research myself and I found on some forum that tons of people were having these issues with ASUS boards, but that's not the case for me, since I have an Intel one.

Here are my computer specs:
Motherboard: Intel DG965SS.
Processor: Intel Core 2 Duo E6400.
RAM: 2x Supertalent 1gb DDR2 667 Mhz.
Video Card: MSI Nvidia Geforce 8800GT.

Back to the topic, in that forum one of the guys that was getting the same download problems as I am fixed it by replacing the Network Card, but I don't think that that's the case for me because its not only my computer getting these problems when downloading, as my brother has another model of Intel motherboard and a different video card. Another guy (one that had an ASUS board) fixed his issue this way:

"The problem was the ActiveArmor SNE (Secure Networking Engine) . Shut it off in the Forceware Network Access Manager (Start>Programs > NVIDIA Corporation > Netware Access Manager > Web-Based Interface)"

I tried looking for that even though I knew I was on an Intel board and found nothing.

Can anyone help me with this problem?

Thanks in advance.

It might also be worthwhile to do a memory test. A bad stick can also cause this