windows 10 can improperly set the auto tuning levels.
Use Cortana to search for “CMD.”
Right-click on “Command Prompt” and click “Run as administrator.”
netsh interface tcp show global
Look for “Receive Window Auto-Tuning Level” under the results in the Command Prompt window.
If it’s set to enabled, it’s turned on, and may be causing your internet issues.
To disable it, run the following command:
netsh int tcp set global autotuninglevel=disabled
the results should be immediate, although it is recommended to restart your PC and power cycle your network gear just to be safe.
Successful command entered:
If that doesn't work for you, you can try to:
Press Windows key on your keyboard, then type CMD on search, right-click on the result and choose Run as Admin.
Type these following commands to reset your internet/network settings:
netsh int ip reset resetlog.txt
netsh winsock reset
Restart your PC and see if the issue is resolved.
Note, both of these solutions are shots in the dark. You have left us with very little information to try and help you with this issue.