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This has confounded me.

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#1 DaviePCRepair


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Posted 05 January 2011 - 08:49 AM

I have a custom built computer that I put together myself for my aunt. I am having problems with windows 7 64-bit. Here is my problem. Everything on the computer works great with exception to anything that needs to be downloaded (ie. flash games, downloading programs, loading youtube videos, etc.) Basically, anything that requires something to load from the internet starts off with a great speed (~900kbps-1MBps) and suddenly drops to about 14kbps. I have checked drivers, I have checked firewall settings, I have checked port forwarding on the router, I have check port settings on the router, I have made special firewall rules, I have checked flash permissions. I am genuinely at a loss as to what the problem might be, so I present it to you all.

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#2 Jacee


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Posted 05 January 2011 - 12:29 PM

Check your network adapter driver.

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#3 Hert


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Posted 05 January 2011 - 03:27 PM

Many file sharing and other sites do not support high-speed racing, but only minimal. This is the problem more often than not your ISP, and looking from rock that you need

#4 thrillhouse


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Posted 05 January 2011 - 03:41 PM

maybe you are being throttled?

#5 haarm


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Posted 06 January 2011 - 09:45 PM

I had a similar problem on my 32-bit Win7 system. I got much improved speed by disabling the autotuning level

As administrator start command prompt (right-click and Run As 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 : disabled
Add-On Congestion Control Provider : none
ECN Capability : disabled
RFC 1323 Timestamps : disabled

I'm not sure what it was set to before I changed it (probably normal), but make note of your setting in case you want to change it back.

>netsh int tcp set global autotuninglevel=disabled

I'm only relating something that helped me... If you're worried about changing a network setting try google autotuninglevel to find some info on what it does.

Good luck...

#6 DaviePCRepair

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Posted 06 January 2011 - 10:01 PM

Just now getting back to checking this. It isn't the ISP as my personal laptop connects just fine and the speed is optimal from my laptop (~850kbps-1MBps) for normal downloads from just about any site. I will check the auto tuning setting and see if tweaking it will improve it at all. I've also checked all drivers and have validated that they are up to date. Thanks for the tips, I will post any results that I find.

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