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Old 2016-10-19, 11:46   #1
pinhodecarlos's Avatar
"Carlos Pinho"
Oct 2011
Milton Keynes, UK

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Default Slow Transfer Speeds with Windows 7

Finally today I've decided to search for the slow transfer speed issue I've had in my laptop since I bought it while downloading the NFS data for the post-processing. My speed was always limited to 1.5 MB/s but not when using torrent or emule. This has been my complain since I started using this laptop and today I've made a test with my wife's laptop and download speed reached connection limit of 10 MB/s!!! So I thought, what's going on here?!

Anyway, this wasn't a real issue because I've been always downloading data at night in parallel with the previous post-processing but this was trigging me.

After as few searches on the web I found this page:

Basically I had ''TCP Window Scaling heuristics'' enable.

So to all to check if your connection is been restricted follow these steps:

To view current settings, open command prompt and use the "netsh  interface tcp show global" and "netsh interface tcp show heuristics"  commands.  C:\Users\Administrator>netsh interface tcp show global
Querying active state...

TCP Global Parameters
Receive-Side Scaling State          : enabled
Chimney Offload State               : automatic
NetDMA State                        : enabled
Direct Cache Acess (DCA)            : disabled
Receive Window Auto-Tuning Level    : normal
Add-On Congestion Control Provider  : ctcp
ECN Capability                      : enabled
RFC 1323 Timestamps                 : disabled
 C:\Users\Administrator>netsh interface tcp show heuristics
TCP Window Scaling heuristics Parameters
Window Scaling heuristics         : disabled
Qualifying Destination Threshold  : 3
Profile type unknown              : normal
Profile type public               : normal
Profile type private              : normal
Profile type domain               : normal
 If the settings do not match above, enter these commands as Administrator, and then restart the download or upload.
 netsh interface tcp set global autotuninglevel=normal
 netsh interface tcp set heuristics disabled
Just thought sharing this to all Windows 7 users if you ever come through this issue, not sure if it applies to Windows 10.


Last fiddled with by pinhodecarlos on 2016-10-19 at 11:59
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