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Windows 7: Some downloads slow on only one computer

1 Week Ago   #1

Windows 7 Ultimate x64
Some downloads slow on only one computer

I'm in the US and have a really strange problem with download speeds on one of my PC's.

All PC's I've tested are on the same network and I get the same results on all except for one.

The problem PC can download all files at the same speed as the other computers with the exception of files from overseas. This PC maxes out at 2.5 MBps when I download anything from the EU whereas all other PC's get 11 MBps with the same files.

Let me describe it a different way:

Results of download of test file #1, US to US:
  • Problem PC - 11 MBps
  • All other PC's - 11MBps
Results of download of test file #2, EU to US:
  • Problem PC - 2.5 MBps
  • All other PC's - 11MBps
The issue is not with one particular file. It's with all EU downloads on this one PC. I get the same exact results in Safe Mode with Networking. I have tried different browsers. I have disconnected the Ethernet cable and connected it to a laptop and get full speed with it so it's not a cable or switch issue. I have changed the IP on the PC and it did not help. I reset the TCP/IP stack and Winsock using commands (Truly reset the TCP/IP stack – Fix network/internet problems | TCAT Shelbyville – Technical Blog) and that made it worse! Now I can't get over 650KBps.

I'm stumped. What could cause this and where do I start to troubleshoot? What is different about packets coming from longer distances away?

My System SpecsSystem Spec
21 Hours Ago   #2
wither 2

Windows 7 Pro SP1 64 bit

I don't know if you've gotten this resolved but I'm replying simply to bump it up in case someone else wants to tackle it.
My System SpecsSystem Spec

 Some downloads slow on only one computer

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