Inside the computers there is always a network card that represents the connection for the LAN cable or from which the antenna (internal in the laptops) for the wifi comes out. Different computers connect to the internet using different network cards and different routers, creating a natural chain that is always so obvious.
When the internet is not working well, sometimes, the problems are due to the internet operator, other times to the internal network configuration.
We have already discussed all possible internet connection problems and how to restore the network if the PC does not connect .
Add to that speech another piece, discussed on the Microsoft Technet forum, where we talk about a specific problem, when the link seems to work well, the connection icon does not signal any problems, but we are unable to load the websites in the browser .
It also happens that the downloads never end and remain still, that the connection comes and goes, as if there is an incompatibility between the network card and the router, as if in this passages all the packets transmitted were lost or for a time -out of the router itself.
If the internet seems to be completely absent, even if on Windows the computer is reported as connected, then you can try the following operation.
Open Command Prompt as administrator, copy and paste the following command and press Enter after each of them.
netsh interface tcp set global rss = disabled
netsh interface tcp set global autotuninglevel = disabled
netsh int ip set global taskoffload = disabled
Then press the Windows + R keys together, type Regedt32.exe in the dialog and press Enter to open the Registry Editor.
Browsing the key tree, expand the following path: HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Tcpip \ Parameters
In the right pane of this position, create the following DWORD type registry key by pressing the right mouse button:
EnableTCPChimney = 0
EnableTCPA = 0
EnableRSS = 0
If this does not change the situation, try also to Change the DNS as already explained and set the Google DNS.
Also make sure you don't have a proxy set up.
Then open Internet Explorer, go to the options, then to Connections and press the "LAN Settings" button, then delete any proxy server.
In another article: Why the internet goes slow and how to fix it
