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Why am I experiencing "low" upload speed on PC

Anonymous
2025-02-04T13:43:43+00:00

When experiencing problems on my mobile (S10e) connection I started to research my internet speed (fibre 100/100):

  • my PC gives 91Mbps down and 18Mbps up on the NIC under Windows 11
  • on Wifi I get 70Mbps both ways
  • my PC gives 90Mbps both ways when running Ubuntu (hence it has to be windows ...)
  • I tried a load of suggestions (all available drivers, LSO-v2, Jumbo, etc).
  • PC-end of cable shows amber (100mb) while switch-side shows green (1GB)
  • I installed Speedtest on my HA which gives intermittent results :-(

Any idea's / suggestions (could not uninstall latest Insider Preview)??

Coen

*** Moved from Windows / Windows 11 / Devices and drivers ***

Windows for business | Windows Client for IT Pros | Networking | Other

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question. To protect privacy, user profiles for migrated questions are anonymized.

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  1. Anonymous
    2025-02-07T14:18:14+00:00

    Hello,

    Based on my understanding of the issue I would recommend the following steps to see if you can improve your network speed:

    Make sure your network adapter is set to auto-negotiate speed and duplex settings. You can check this by:

    1. Open Device Manager.
    2. Expand the Network Adapters section.
    3. Right-click your network adapter and select Properties.
    4. Go to the Advanced tab and look for Speed ​​and Duplex settings.
    5. If it is not already set to auto-negotiate, set it to auto-negotiate.

    If the issue still does not resolve you can reset the network settings in Windows 11:

    1. Select the Start button, then enter settings. Select Settings > Network & internet
      • ​​​​​​​On Windows 11, select Advanced network settings > Network reset.​​​​​​​
      • On Windows 10, select Status > Network reset.
    2. On the Network reset screen, select Reset now > Yes to confirm.
    3. Wait for your PC to restart and see if that fixes the problem.​​​​​​​

    Best Regards

    Zunhui

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  2. Anonymous
    2025-02-07T20:09:45+00:00

    Treedt your suggestions (again) but unfortunately no improvement 😞.

    Thnx for the effort,

    Coen

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  3. Anonymous
    2025-02-14T08:31:47+00:00

    Hi,

    Thank you for your reply.

    I suggest you try the following method to reset the network to see if it can solve the problem:

    1. Press Win + R to open the Run window, enter regedit and click OK to open the registry, and locate it at the following location:

    HKEY_CURRENT_USER \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Internet Settings \ Connections.

    1. Then delete the "Connections" item and restart the computer.

    Note If you modify the registry incorrectly, you can cause serious problems. Therefore, follow these steps carefully. For additional protection, back up the registry before you modify it. For more information about how to back up and restore the registry, see How to back up and restore the registry in Windows.

    1. Open cmd as an administrator and run the following command.

    netsh winsock reset

    Best Regards

    Zunhui

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  4. Anonymous
    2025-02-14T10:09:58+00:00

    Hi Zunhui,

    Thnx for thinking along, but your latetst suggestion did not solve it either. The registry gave and gives the same for Connections:

    Rather empty; should it say more 😉?

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