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Windows 7: Extremely slow file transfers and network access...

25 Sep 2011   #31

Win7 Ultimate x64

On my Asus P8P67 Pro Rev 3, with an Intel 82579V network card, the "IPv4 Checksum Offload" is actually a "sub-option" of the setting titled "TCP/IP Offloading Options", so when "TCP/IP ..." is highlighted a "Properties" button is available, and the IPv4 Checksum Offload is one of several "tasks" that can be enabled or disabled.

My System SpecsSystem Spec
25 Sep 2011   #32

DELL Win 7 Home Premium 64 Bit

Windows told me my Intel NIC 82566DC drivers were up to date, but I went to the intel site, and sure enough, updated drivers exist.

With the new drivers
  • My Win 7 pc to XP pc transfer speed improved from a unusable 175kb/s to a still very slow but better at 1.5 MB /s
  • My Win 7 pc to other Win 7 pc transfer speed improved from a dismal 175kb/s to more respectable 30 MB /s. I updated the drivers on that machiens as well and now is up to 60 MB/sec -excellent
With the new drivers, I now have more "offload" options... do I have these, and others, set correctly re addressing this isssue??

Attached Images
Extremely slow file transfers and network access...-nic_auto.png Extremely slow file transfers and network access...-nic_large_send.png Extremely slow file transfers and network access...-nic_offload.png 
My System SpecsSystem Spec
06 Oct 2011   #33


what can my problem be?
I have a stationary computer with a 1Gbps network card + a dlink dir-655 with the support of 1Gbps
I also have a laptop with 1gbps ethernaet card. Both computer is connected with cable to the dlink router.
Here´s the problem when i send files to my stationary computer it can send files between 8-16MB/sec.
But when I wanna send files from my stationary to my laptop it can only send at the speed og 180kb/se-400kb/sec WHYYY?? getting really frustrated here...
Please help....
My System SpecsSystem Spec

19 Oct 2011   #34

Windows 7 Professional 64 bit
This worked for me...

I had the same problem with a slow network connection (15 Kb/s) and even losing the connection to network drives while copying etc. After trying several of the suggested solutions this one worked for me on my Asus u36sd with Atheros AR8151 ethernet card (with up-to-date drivers):

1. From the Run command: ncpa.cpl (or go via Control panel to Network connections)
2. Right click on 'local area connection' > properties
3. Click 'configure' to open new dialog box
4. In 'Advanced' tab: select TCP checksum Offload (IPv6) & select 'Disabled' from drop-down menu.

Thanks for the tips & good luck :)

My System SpecsSystem Spec
01 Jun 2012   #35

Windods 7 Ultimate x64, 8GB DDR3, 1TB


I wanted to take a moment to thank you for your support For This Solution when we were experiencing difficulties with our PC system. Your help was critical in troubleshooting resolving the issues. I understand that you bent over backwards for us, spending a significant amount of time in conference calls and research on our behalf. Your commitment to delivering excellent service made a huge impact on our company's ability to connect with our customers at a critical time during our busiest season.

Problem Solved !!!
My System SpecsSystem Spec
11 Jul 2012   #36

Windows 7 64bit
You must have the right switch for Fast transfers

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

•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


My System SpecsSystem Spec
13 Aug 2012   #37

Windows 7 Ultimate 64bit

Registered just to say I was having the same problem and turning off tcp ip4 checksum solved it (still don't understand why my laptop is fine - old dell laptop - and the checksum is enabled)

What does this check actually do? Also no idea why this started happening... everything was fine until a few days ago

My System SpecsSystem Spec
18 Jan 2013   #38

Windows 7 Pro
One problem solved One to go! Windows 7 file xfer speed

Like SO many others across the planet, I too have experience the two seemingly common Win 7 issues that is BEYOND frustrating!!!

I have a Windows 2003 server. It has a RAID Volume and a 2 Terabyte SATA drive. We have 1 Gig unmanaged switches and wiring throughout.

All our PCs are HP XW6400 workstations with at least 4 Gig RAM, they all run on onboard Broadcom NetXtreme Gigabit Ethernet.

All our PCs were XP Pro and ran PERFECTLY and FAST until recently where we needed to update to Win 7 64 for our video editing.

That is when this mess began, and me pulling my hair. All the Windows 7 PCs have the same issue, PAINFULLY SLOW file transfers in the kb/sec range and drilling down on the MAPPED folders is like watching paint dry!!!

Today I decided I was going to get to the bottom of this no matter how long it took.

I have spent over 4 hours now trying all the "solutions".

Issue 1: Drilling down folders

After trying nearly everything out there, nothing seemed to work for me....changing the properties from Video to General to Pictures etc. never did a thing for me.

Even though Windows 7 said I had the latest driver for the broadcom card, and HP website did not show any further updates than what I had.....I went to the BROADCOM support site and was surprised to find a whole array of NetXtreme drivers for every OS including one specifically for Win 7 64bit

I download and installed the software and WOW!!!! Instantly without even restarting I could drill down Folders as FAST AS I COULD CLICK!!! Didn't matter if I had a 1000 pics, videos, files it opened and displayed the contents as fast as I could click


Please note: I dont know if this fixed it ALONE. Just in case, I want you to know that prior to this I also implemented a number of suggestions that MAY also be needed.

You can find that list here: Windows 7 Network Slow - 6 Easy Ways to Make it Fast

Later I am going to reverse all this and see if it has any effect


Since updating the Broadcom driver I am getting faster speeds. I have gone from speeds in the Kilobits, then with some changes people have suggested such as unchecking IPV6 I got it faster but the real improvement was the driver which has now got me to 11 MB/second, but still far slower than my XP computers.

Curious thing....this is supposed to be a gig chipset, but when I go to my NIC settings the highest speed stated is 100MB and this is after the update of the driver from I am puzzled as to why I cannot see 1000MB, and that might explain why I am only getting 11MB/sec

So in summary, I am now working at least to the point of being functional, but having to wait several hours for a 112Gig transfer of 25 files is still FAR TOO LONG!

If anyone else has any ideas on how to fix the 1000MB issue or to increase overall performance please let me know.

I hope this post will help other equally frustrated people....because Microsoft sure isn't doing anything to fix this.
My System SpecsSystem Spec
24 Jan 2013   #39

win 7 home premium 64bit

My hardwired internet connection was 75mb/s download, 0.12mb/s upload, and it ran like that for almost a year. If I ran the desktop wirelessly, I had a 35mb/s download and a normal 10mb/s upload. I hardwired a different desktop running ubuntu and the speed was 75mb/s download with 15mb/s upload so the problem was definitely with windows 7. After messing with the settings listed on this thread, the upload speed improved but was still only a barely tolerable 1.5 mb/s.

Infuriated with windows 7, upgraded to windows 8- straight away the connection speed was 75mb/s with 15mb/d upload, just like the ubuntu machine.
My System SpecsSystem Spec
13 Mar 2013   #40

Windows 7 Enterprise x64

We had extremely slow file transfers to/from network drives for a completely different reason. With a Windows 7 client and a Windows 2008 server or a NETAPP NAS, or an EMC NAS the results were all similar.....awful performance. The Windows 7 client had McAfee removable media encryption which includes a feature for network file and folder encryption that we were not using but had not disabled. As a result, the non-encrypted network transfers started out looking for a .cekey file which would have been used for the encryption, but it didn't exist and there was a bit of a delay waiting for the timeout looking for it. But that isn't the real performance issue. Until you DISABLE the file and folder encryption there is a ton of overhead on the file transfer, even if the files are real small.

For version 3.x.x there is a single registry key to make (there are 2 for version 4.x)

  1. Click Start, Run, type regedit, then click OK.
  2. Navigate to: [HKLM\System\CurrentControlSet\Services\Service\SbCe].
  3. Right-click SbCe and select New, DWORD.
  4. Create a value called ExemptNonRemovable.
  5. Double-click ExemptNonRemovable and in the Value data field type 1, then click OK.
  6. Close the registry editor.


After disabling the file and folder encryption that we weren't using the file transfer performance was about 2-3 times faster. We also found that some of our EMC NAS devices has bad OP LOCK (opportunistic file locking) configurations. Getting that straightened out made our NETAPP and EMC systems perform similarly....both bad instead of one bad and one really bad... until the client was fixed up and then all servers systems performed quite nicely.

Because Windows 7 prefers to talk using SMB2 instead of SMB like Windows XP, somehow the smarts in SMB2 was trying to create the network files with requested permissions that were denied when the server permissions were MODIFY instead of FULL CONTROL. Windows XP didn't try for these different permissions so that difference was a distractor that stopped us from focusing correctly on the McAfee product until the attempt to find a .cekey file tipped us off that McAfee was part of the configuration problem.

For us, TCP/IP v6 versus v4 was also a distractor. Some of our network doesn't route v6 yet so it COULD have been part of the problem if we were actually negotiating down to v4 and taking time to do so....but we weren't. We even forced Windows 7 to operate as SMB for a test. You can really see that SMB2 is more efficient when it isn't messed up for the file/folder encryption product. There are less packages and they can grow to the right size to better optimize the transfer.
My System SpecsSystem Spec

 Extremely slow file transfers and network access...

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