Windows free when downloading large files with P2P Client-Torrents

Hello,

First of I would like to welcome everybody on this forum, whenever I had any trouble with my computer I managed to find the solution on this site, however, this time I am helpless, so I have registered myself.

Now, back to the case,

I am using Sony Vaio laptop with, i5 2410M, 8gb of RAM, NVIDIA GeForce 410M graphics card and sony motherboard, running Windows 7 Professional.

Couple of days ago computer started freezing when downloading torrent files, also during copying any larger files from partition D. I run checkdisk, literally checked what I could, found nothing, so I decided I will do a clean install of Windows. That did not help either so after excluding hard drive failure (no bad sectors, no errors) I decided to nuke the whole drive so everything would be fresh.
Used DBAN, which finished after 10 hours or so, no errors, everything went smoothly, including the install of fresh Windows 7 Professional.

There are no bug, errors, hard drive problems with the computer, I did run checkdisk again, checked the drivers, everything is fine.

I have managed to narrow the issue to Vuze Client, which was freezing the whole system, first after 5-15 minutes, then immediately after opening application. I also tried Deluge and BitLord - same thing, works fine and then starts to freeze the system.

I am able to use Chrome during the freeze for example, yet my internet connection is frozen too. I cannot restart the computer through the start menu, even if i manage to click on the "restart" button.
The only solution is hard reset with on/off button..

I have read several threads about similiar issues, and none helped me. I tried reinstalling Realtek Ethernet Driver (which allegedly works fine), installed previous versions of it, newer one etc., also tried to find Task Offload in Advanced setting of the driver, but it was not there.

Tried uninstalling Norton 360, not a solution either.

I have also noticed, that if the file is not larger than 1GB the torrent client does not freeze the system and there is no problem with finishing the download. Larger files freezes everything though.

What else can i try? I upload the zip file, with log, hope that helps a bit.

Thank you very much in advance, and sorry for my English, sadly, that is not my native language.

Cheers,
Raf