I've got a home network running 5 computers (4 with windows 8 and 1 with winxp).

All got 1Gig NIC's connected through a 1Gig switch.  When things work normally it transfers files at close to 100MB/sec.

I've been struggling to resolve slow / erratic file copy behaviour when I pull (copy) files from folders shared on other windows 8 PC's on the network.  I use Windows Explorer to copy files.

By slow & erratic I mean:

1) stuck on "Time Remaining: Calculating ..." for excessive periods of time.

2) file transfer starts at 100MB/s and rapidly drops down to 0KB/s in seconds (after a minute it speeds up again for a couple of seconds and drops right down to 0KB/s again) until eventually it finishes.

3) during file copy the network traffic appears to choke.  Internet connections / traffic grind to a halt on other PC's.

I've found a lot of articles where people complain about similar behaviour, some recommendations work temporarily but eventually the problem re-occur.

I followed all the recommendations out there:

1) Disable autotuning

2) Disable RDC

3) Disable Bandwidththrottling

4) Disable Large Send Offload

5) Turn off Home Group

6) Disable NIC green/power management settings

7) Speed & Duplex set to 1Gbps Full Duplex

8) Large Send Offload for IPv4 and IPv6 disabled

9) and more ...

Can anyone please help with resolving this problem or put forward some ideas as to what is causing this.

The only workaround that currently seems to work consistently for all PC's to evade this problem is to disable the internet connection on the PC that the files are being pulled from (for the period the file copy occurs).  While the internet connection is active for a specified PC where files are being copied (pulled) from then the erratic file copy behaviour occurs.

Also when pulling files from the Winxp PC's this behaviour does not occur.

It only occur when files are copied between any of the windows 8 PC's.

Hi,

I suggest you also try the following:

Search for Local Security Policy and run it as administrator. Under Security Settings -> Local Policies -> Security Options.

1) Open Network security:Minimum session security for NTLM SSP (including RPC based) Clients, unselect Require NTLMv2 session security and Require 128-bit encryption.

2) Do the same operation to Network security:Minimum session security for NTLM SSP (including RPC based) Servers.

3) Open the policy Network Security LAN Manager authentication level. Locate and select the option Send LM & NTLM use NTLMv2 session security if negotiated. Click Apply, and close out of all policy management windows.

Regards,

Hi,

Thanks, did it on both PC's (the one sharing the file and the one pulling the file) but it still does not resolve the problem.

The moment I disconnect the PC (sharing the file) from the internet then file transfer shoot up to 100MB/sec on the PC pulling the file. 

Internet connection is a 4Mbit/s connection and nothing is downloading or uploading in the backgound.  Even if there was something I'm not aware of the connection is to slow to interfere with the internal network LAN transfers.