Windows 7, network transmit (send) not working

Posted by user326287 on Super User See other posts from Super User or by user326287
Published on 2014-05-24T09:27:28Z Indexed on 2014/05/27 15:33 UTC
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My Win 7 works 2 years without problem. But now, I can't transmit (send) big data on LAN/Internet. I can: - Ping anything - Browse Internet, download files at full speed - Send e-mails with very small attachments. - Testing download speed on Speedtest.net, measure stable full speed. I can't: - Testing upload speed on Speedtest.net. Upload stuck.. - Save/send email messages with big (>128k) attachment, independent from e-mail provider or e-mail box.

THIS IS NOT A HARDWARE/CABLE/CARD OR OTHER NETWORK DEVICES PROBLEM! When I boot from a Linux Live CD, without ANY hardware change, all data sending, testing works correctly, at full speed.

I have tried already in Win 7: - Disable Windows/3rd party Firewall completely - Reset IP stack parameters (netsh int ip reset c:\resetlog.txt) - Computer restore - Reinstall LAN driver

When I inspect the packets in Wireshark in Windows, I see lot's of (maybe 60% of sent packets) "TCP Retransmission". Sometimes receive "TCP Dup Ack" or "TCP Out-of-Order".

Linux don't do this.

Thank you for the help.

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