Ethernet TCP Latency, PC freezes, Msn msgr freeze, lock up, hang

Hello everyone.


I am currently owning a very sweet notebook, Sony Vaio Z Series VPCZ12.
Ever since I bought it, there was an issue with random freezes, lock ups and such.
Those freezes would happen 4 hours after boot, sometimes 10 hours...

I have basically diagnosed the whole pc, I have all by myself tested different things.

Finally after a month of testing the notebook everyday for like 10 hours, I realized where the problem was.


The freezes are caused by my network adapter. And yes, I do have the latest driver for it.

To be more specific, what happens is:

1.) When opening a chat window in msn messenger, it first shows a blank, white window for 3-5 seconds, and then it becomes normal.
2.) While browsing internet, the screen freezes...hangs...the browser is not working good at all...


So what have I noticed?

During the freeze period, i went to the Resource Monitor, and checked the network diagnostics...
And what I found out is, that during the lock up's/freezes, the TCP connections have latencies between 250 and 400ms! ( normally the latencies are between 0 and 60 ) HAHA! Gotcha!
(ATTACHING A SCREEN!)


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What I have also checked is, when the freezes occured, I disabled the network card in the device manager, and enabled it again, no freezes for a next couple of hours!


My question is, what could be a cause of this?

In addition, it has all been performed on a clean OS right after a format.

Any ideas? Help appreciated :) The laptop costed me 2000 pounds, and it is sort of useless right now...with all those freezes.