Oct 222009
 

If you experience Slow Network Connection or file copy from and to the Windows 7 PC or laptop takes ages to completes or connection disconnects then this could be caused by the Task Offload settings. The task offload settings are enabled by default at the NIC level and globally at the system level. This should work for Windows Vista as well.

These could be

TCP Checksum Offload

UDP Checksum Offload

TCP Large Send Offload

IPSec Offload

To quickly resolve the problem, disable Task Offload globally that disable all the above Offload settings by doing the following:

1. Click Start and type “cmd” at the search box.

2. Right-click “cmd” icon and select “Run as Administrator“. This should lainch the command prompt with elevated permisions.

3. Run the following command to check the enabled offload tasks:

C:\Windows\system32> netsh int ip show offload

Interface 11: Local Area Connection

ipv4 transmit checksum supported.

udp transmit checksum supported.

tcp transmit checksum supported.

tcp large send offload supported.

ipv4 receive checksum supported.

udp receive checksum supported.

tcp receive checksum supported.

3. Run the following command to disable all Task offloads:

C:\Windows\system32> netsh int ip set global taskoffload=disabled

OK.

This should disable all the offloads.

4. Disable and Enable the NIC from “Control Panel – Network and Internet Connections – View Network Status and tasks – Change Adapter Settings“.

5. To check if all Offloads are disabled run the following command:

C:\Windows\system32> netsh int ip show offload

Nothing should be listed. This should help.

Also you may try disabling the power management option on the NIC as follows:

1. Click Start, right click “Computer” select Properties.

2. Click Device Manager. Right-click your NIC and choose Properties.

3. Choose Power Management tab and uncheck “Allow the computer to turn off this device to save power.

4. Restart the computer and check if it works.

This should help especially with the Network disconnects.

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  15 Responses to “Slow Network copy and connection drops in Windows 7”

  1. I tried many things. This did the trick for me! Thanks!

  2. “Nothing should be listed. This should help.”

    I got that list again instead of “Nothing should be listed”

    Interface 11: Local Area Connection
    ipv4 transmit checksum supported.
    udp transmit checksum supported.
    tcp transmit checksum supported.
    tcp large send offload supported.
    ipv4 receive checksum supported.
    udp receive checksum supported.
    tcp receive checksum supported.

    Any ideas?

  3. This didn’t work for me. However, getting a new driver from the manufacturer of my NIC did.

  4. hmi: Reboot your pc. It worked for me.

  5. i have input the commands and this still shows up

    Interface 11: Local Area Connection
    ipv4 transmit checksum supported.
    udp transmit checksum supported.
    tcp transmit checksum supported.
    tcp large send offload supported.
    ipv4 receive checksum supported.
    udp receive checksum supported.
    tcp receive checksum supported.

    but when i try to check my download speed, it is now ok.
    i also did the remote differential compression. try the link below if it works for you…

    http://www.windowsreference.com/windows-7/slow-network-file-copy-issues-in-windows-7-caused-by-remote-differential-compression/

  6. Thank you very much. I have been bugged by this problem for a month and I tried almost every solution I could find in the internet. Yours is the only one that worked.

  7. I have two Freecom network disks that store large video files (>1 GB). I had no problems under Vista to copy video files from the PC to the NetDisk, but with Win7 the copy process always stops near 1.2 GB (smaller files are ok for copy). Applying the above procedure solves the problem.

  8. Does this work on Wifi Network connection or I have to use LAN cable. Coz I tried this through the wifi connection network and the speed is only 1.16 Mbps. If I use the LAN Cable, how much speed can I get? Here is my computer specification:

    Windows 7 32-bit
    Intel Core 2 duo processor @ 2.58GHz P8700
    4GB Ram

  9. This surely fixed my problem, thanks for the headsup, this wasn’t covered in my MCITP exam :P

    Thank you again :)

  10. Tried and tested all the solution to resolve my extremely slow WLAN on Win7 x64. Nothing works :o(

  11. This is not a solution, but rather a bandaid for an underlying problem with hardware or a network driver.

  12. I have 2 things listed one is Interface 1: Loopback Pseudo-Interface 1 and Interface 12: Local Area Connection. Is this supposed to be there but all the others are not listed anymore. The problem I was haveing was random disconnets and errors that said dhcp server denied ip lease even though the lease was just attained that day used to not do this but lately has been atleast once a day, got a new modem still happens, updated nic drivers didn’t fix it either, I hope that this does.

  13. It worked! Great article, thanks!

  14. “This is not a solution, but rather a bandaid for an underlying problem with hardware or a network driver.”

    This seemed right.

    And the new network driver fixed it for me too.

    If your computer is supposed to work fine with offloading on, and you’re turning it off, no that can’t be “fixing” anything.

  15. Requirement for full speed ethernet transfers (75% of 1000 every transfer +) is a Non-blocking, wire-speed transmission switch!

    Switches:

    •ZyXEL’s GS1100-16 16 Port Desktop GbE Switch is a 16-port 10/100/1000 switch (I’m getting 700-800Mbit or 80Mbyte transfers)

    •ZyXEL’s GS1100-24 The GS1100-24 is a 24-port 10/100/1000 switch

    •ZyXEL’s GS-108B 10/100/1000Mbps Port Desktop GbE Switch is a 8-port 10/100/1000 switch

    •Cisco SR2024 24-port 10/100/1000 Gigabit Switch

    •SMC Networks – SMC8508T – EZ Switch 10/100/1000 – 8-Port 10/100/1000 Gigabit Unmanaged Switch

    •Linksys SR2016 The 16-Port 10/100/1000 Gigabit

    Please try the examples given but if you don’t have the right switch then it won’t matter what you do at the OS

    Regards,

    Jason

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