Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Ethernet TCP Latency, PC freezes, Msn msgr freeze, lock up, hang

27 Oct 2010   #1

Windows 7 Pro 64bit
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!

Uploaded with

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.

My System SpecsSystem Spec
27 Oct 2010   #2

Windows 7 x86/x64, Server 2008r2, Web Server 2008

It sounds like its your network card... return the Laptop and exchange it Or contact sony....
My System SpecsSystem Spec

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

Thread Tools

Similar help and support threads
Thread Forum
Random Freeze/Hang When Running Applications
After several weeks of struggle with BSOD I was finally able to clear the problem up but i still have an unsolved problem which i decide to post it here because it's not a BSOD anymore. Well it's just as the title says, the freeze occurs randomly. Not only when i run some games, it also occurs when...
Performance & Maintenance
WIN 7 ultimate x86 RANDOMLY hang (freeze)
I bought a Samsung notebook NP350E5X I clean installed Win7 Ultimate x86 But sometimes it happens that Win7 completely freeze, mostly happens when surfing the net. Sometimes when I'm working in excell. I have the same copy of Win7 installed on another machine, but I had no problems with...
Performance & Maintenance
high dpc latency 3.8 seconds! ataport.sys intermittent a/v buzz/freeze
Microsoft drivers are running the onboard hd audio, the realtek drivers don't seem to load; i've downloaded some updates for this jurassic MB from asus for windows 7 and they can't find the hd audio device so they won't install. i've also downloaded some updated drivers from realtek but haven't...
Sound & Audio
WindOws 7 FREEZE/Hang problem
Windows 7 starter Frequently Freeze 50-60 times in a day in ACER 5745, 2GB RM, 500GB HDD. I have installed windows many times but still hanged... What should i do??
Performance & Maintenance
FREEZE: What's the hang up?
My Windows 7 Ultimate installation has been hanging lately. I don't mean crashing. I mean, it stops responding. OK, I'm a mean old user that often does not reboot for days. Worse, I use my computer a lot. I typically have 20 or more windows open during the day with things that I am currently...
BSOD Help and Support

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 12:26.
Twitter Facebook Google+