Slow network copy speed

[hexland]

My system is

- Intel Q6600 2.4Ghz Core 2 Quad

- 6Gb RAM

- 80Gb SSD (Intel X-18M gen 1)

- 1Tb Seagate HDD

- 1Gb NIC / LAN connection

I'm experiencing some severe network issues when copying files to/from my PC... I have a Windows Home Server machine from/to which I get around 50-60Mb/s copy rates from my laptop and Mac Mini.

From my main PC, I get maybe 1 or 2 Mb/s. While this copy operation is taking place, my CPU usage (on one of the 4 cores) is 100%, and the machine becomes practically unusable.

It took me a while, but I tracked it down to MalwareBytes... when the program is loaded/operational... my network access if fubar... when it's completely unloaded, it runs fine with high speed copy operations and no CPU usage.

Any idea what could be going on? Is it trying to scan every network file copy/operation?

Other major software packages installed...

- Windows 7 x64 (Ultimate)

- Visual Studio 2010 Professional

- Adobe Photoshop CS 4

- Autodesk Maya 8.5

- CDBurner XP

- Microsoft Security Essentials

- Microsoft Office 2007

- Freescale Codewarrior

- Microsoft DirectX SDK (Aug 2009)

- K-Lite Codec Pack (Full)

[noknojon]

Please try this on the computer that is having an issue.

This will ensure a clean / fresh copy of the program -

1. Uninstall Malwarebytes' Anti-Malware using Add/Remove programs in the control panel.

2. Restart your computer (very important).

3. Download and run this utility. mbam-clean.exe

4. It will ask to restart your computer (please allow it to).

5. After the computer restarts, install the latest version from here. mbam-setup.exe

Note: You will need to reactivate the program using the license you were sent

Launch the program and set the Protection and Registration. Then go to the UPDATE tab if not done during installation and check for updates.

Restart the computer again and verify that MBAM is in the task tray and that you can run a quick scan and all is working as expected.

Note: The procedure is the same for free version as for paid version (Just no license to activate)-

Thank You -

[hexland]

Followed the steps as required, but same results.

I found another thread about adding MAB to Microsoft Security Essentials exclusion list (files and processes), so I tried adding that too... but no effect.

I don't know if it's worth mentioning, but this is a completely clean system install from last week -- should be no bloatware, spyware, etc.

It appears to be the IP Protection module... if I disable IP Protection (right click on the system tray), I no longer experience the problems. Is there a system log or something I can check? (there's nothing in the Windows logs)

[AdvancedSetup]

This issue does appear to happen for some users on Windows 7. We've not been able to determine at this time why it affects some users and not others though, we've also seen it on some Vista systems, but again not everyone. For now the only suggestion I can offer is to either temporarily disable it while doing file downloads or transfers. You can also permanently disable it if you like.

http://forums.malwarebytes.org/index.php?s...mp;#entry162100

[hexland]

OK, thanks guys.

I've got a new i7 930 machine arriving this week, and I'll be freshly installing all my OS and tools... I'll be installing MB on there too - I'll let you know how if I experience the same thing on the new hardware.

While I'm at it... is there anything you'd like me to try?

[AdvancedSetup]

Nothing that we've not already tried. If anything comes to mind though I'll be sure to let you know. Just puzzling why some seem to not experience it and others do.

[Y.T.]

Hello,

I have had this problem on a couple of machines running Windows 7 64bit.

It appears to have something to do with the NIC-drivers.

When you adjust some of the "Advanced properties" of the driver, the problem disappers with no side effects ( for as far as I have noticed ).

At least, after the adjustments, I have had no complaints from customers.

1: Disable the "Large Send Offload".

2: Disable the "IPv4-checksum-offload".

3: Disable the "TCP-checksum-offload".

4: Disable the "UDP-checksum-offload".

for IPv4 and IPv6

All NICs were Realtek models. I don't know of this has anything to do with it.

I hope this information helps you to solve the problem cause I really think it's a great program otherwise!!!

[Canukhed]

1: Disable the "Large Send Offload".

2: Disable the "IPv4-checksum-offload".

3: Disable the "TCP-checksum-offload".

4: Disable the "UDP-checksum-offload".

for IPv4 and IPv6

All NICs were Realtek models. I don't know of this has anything to do with it.

I hope this information helps you to solve the problem cause I really think it's a great program otherwise!!!

Not trying to be off topic but I just wanted to show my appreciation.

Thanks for the network tip. I never actually know what those particular settings did until now. I did research on them here:

http://publib.boulder.ibm.com/infocenter/a...end_offload.htm

Disabling these settings does help alot.

Thanks.