How many times has it happened that you could not surf the Internet on your PC due to a generic network error or because the network icon on Windows briefly indicated "Not connected or no Internet connection", without specifying precisely what is not working on our computer.
If you too have come across such a scenario, you have come to the right guide: here we will show you how to restore the Internet connection in case of limited or absent connectivity on your PC, so that you can resume work where we left it and be able to open the webpage we wanted to visit before the crash or error.
The steps described are quite simple to apply, so you don't even have to call your computer technician or trusted friend to have your computer repaired.
READ ALSO: Red modem LED (no Internet): what to do before calling for assistance
How to restore the network if there is no connection
Many guides similar to this are made with passages that are difficult to apply or with procedures within the reach of only IT experts. We will follow a very different strategy: we will only show you the procedures and programs that everyone can use, even users who have recently used the computer in a stable manner, so that they can restore the PC on their own in case of no connection.PC connectivity check
Before trying any programs or testing the network components, make sure that the PC is really connected to the home network, by pressing on the bottom right of the world icon with a barred signal (which will appear only when there is no Internet connection), and making sure to activate the Wi-Fi connection or to switch off Airplane mode (which we have perhaps activated or switched off by mistake).
If the Wi-Fi connection is active, we check that we are connected to a network for which we know the password, so that we can quickly restore the missing network connection. These steps are superfluous if we connect via Ethernet cable: in this case the Internet connection is immediately available, especially if we connect the computer directly to the modem.
Programs to restore network connection
The connection is absent only on the PC in use, while the other devices connected to the same network navigate without problems "> TCP Optimizer.
Once opened, simply indicate the average connection speed before the block (in the Connection Speed field), then put the check mark at the bottom on Optimal and finally on Apply changes .
The next time you restart Windows we can take advantage of the optimized TCP features, so as to open the Web pages faster and solve any technical problems otherwise difficult to find.
If the connection still does not go, we can try the automatic tool compatible with all Windows (including Windows 10) to reset the TCP / IP and automatically restore all the TCP / IP parameters that may have been unpacked or modified (by a program or by a virus ), without having to launch any type of manual command (difficult enough to manage).
The network recovery tool is already included in Windows 10 and can be found in Settings> Network and Internet> Status ; scroll down the screen on the right to find the Network Recovery link.
For Windows 7 and Windows 8.1 the automatic tool can be downloaded from the Microsoft website.
Another good program to solve Internet connection problems on PC is Complete Internet Repair.
By launching this program and letting it act, all the system connection parameters, the parameters for the browsers and all the types of protocols that a modern operating system can use to connect to the Internet or one of its services will be restored. After launching this tool we will surely be able to browse the Internet (always if the problem was with the connection parameters of Windows).
Connection check (Wi-Fi or Ethernet)
If at the software level the connection is OK, the problem can be on the Wi-Fi network or on the Ethernet cable used for the connection.
In this case we advise you to act from the modem settings, so that you can change the transmission channel of the Wi-Fi frequencies, as seen in our guide Make the WIFI faster by changing a single option .
Alternatively we try to connect the computer via Ethernet cable, to see if the connection is recovering or is still absent: if the PC is close any cable will suffice, while if the computer is in another room we will have to use a very long Ethernet cable, like the one visible here -> CSL - 10m Network Cable - Cat.6 (10 €).
Did the connection recover via Ethernet cable? In this case we will have to do something to enhance the Wi-Fi signal or use the cable connection in all rooms where it is necessary to have an Internet connection. In this regard, we advise you to read our guides on How the wifi repeater or "Range Extender" works and which one to buy and how to have Internet on the power outlet with the Powerline .
Problems with the modem
If not even the steps described above solved the problem, it is probably the modem that is not working properly.
In this case, as we advise you to turn off and on the modem or router that we use, so we can immediately see if it is a temporary problem or we will have to investigate more.
If the connection resumes, the error was temporary but could clearly indicate that our modem is not up to the devices we connect: it is better to choose a new one immediately, such as those seen in our guide Best Modem to buy (fiber, dual band, wireless AC) .
If we have not solved this way, we will have to carry out further checks as seen in our articles How to understand if the modem router is faulty and How to reset the modem .
Conclusions
Unfortunately it can happen to have a PC that suddenly does not connect to the Internet on the most beautiful, when maybe we wanted to use it to work or to study: we do not get discouraged and we carefully follow all the steps described in this complete guide, so you can understand immediately where is the connection problem and solve it in a few clicks.If the malfunction is due to a virus infection, we advise you to also follow the suggestions proposed in our guides Clean up the PC infected with malware by eliminating all traces and how to Reset Computer with virus .
If, on the other hand, we are looking for a way to restore the functioning of Windows without losing all personal data, we invite you to read our article on How to make your computer look like new without reinstalling Windows .
