Some users may encounter an issue where they are unable to use the Internet even though they appear to be connected through either Wi-Fi or Ethernet. Restarting the computer will, in some cases, fix the problem temporarily.
Before troubleshooting this issue with the suggestions below, make sure you have clean-installed the latest Killer Control Center and device drivers. You can do this by following our clean-install guide.
The Registry Fix
Another problem has been confirmed to be an issue with Windows 10’s port management, which has surfaced with recent updates. This issue is a reoccurrence of a problem that affected Windows 8.1, but the fix remains the same. These updates have removed entries from the Windows 10 registry which instructed the operating system to release used ports when all ports are exhausted. Ports are a list of finite virtual numbers that are necessary for any network connection. If all ports are open and not released, this creates the effect of being connected to an Internet connection without the operating system having the ability to open new ports. Applications and services that were already connected may or may not continue to function, at least partially, while the user is unable to browse the Internet or connect to anything else.
We have confirmed that you can often resolve this by replacing these registry entries. Here is a step-by-step guide:
- Click Start
- Type regedit and press Enter
- Click File > Export… and then save the file to a place you will remember. This file is your registry backup. If anything goes wrong, you can double-click this file from your machine, and it will restore your current registry settings. The export may take a moment.
- Once the export is finished, copy this line – HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters – and paste it into the white space directly below File – Edit – etc., and press Enter, which should navigate you to the correct location in the registry, as seen below (right-click on the image and open image in a new tab to expand):
- With Parameters remaining highlighted on the left side, right-click the empty white space on the right and click New > DWORD (32-bit)
Even though nearly all Windows 10 installs are 64-bit, DWORD (32-bit) is the correct selection.
- Name it TcpTimedWaitDelay and press Enter.
- Double-click the newly created TcpTimedWaitDelay and change the Value to 0000001e. Leave the Base setting as Hex. It should look like the below screenshot.
- Click OK.
- Repeat steps 5-8, creating the following keys:
- Name: MaxUserPort
- Name: TcpNumConnections
- Name: TcpMaxDataRetransmissions
- Name: MaxUserPort
- Click File > Exit
- Restart by clicking Start > Power > Restart and test.
If the issue returns, future updates of Windows may overwrite these changes. Unfortunately, the best remedy will be to re-input these registry keys if you find that they are missing with future updates.
If you have followed all of the troubleshooting steps above and are still experiencing issues, please contact us by clicking the button on the left. Make sure you include a diagnostic so that we can analyze your specific situation appropriately.