Tuesday, October 20, 2009

Windows 7 Slow Network access

I've seen a similar problem on Server 2003 machines a few times, but I've just recently encountered it on a Windows 7 machine. It's always on a machine with a Broadcom 57xx chip, and in this case it was a Dell Precision 690.

The issue is browsing file shares on other machines. File transfers will be very slow, as will just browsing between folders on the share. If you are experiencing network performance issues on Windows 7, try running the following from a cmd prompt with elevated privileges:
netsh interface tcp set global chimney=disabled

4 comments:

Torch Trader said...

I'm having the problems described, uber slow file copies, with a Broadcom 400x 10/100 but that command didn't seem to help. :-(

- js

Jar said...

Try Disabling and then Enabling the network connection your using (either wired or wireless), sometimes you have to do it twice but it speeds it up... until the next time the computer is restarted.

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Jar said...

A better command to use if Windows 7 is running slow is:
netsh int tcp set global autotuninglevel=disabled

This has worked on every computer I have tried it on.