Laptop with windows 7 does not connect to the internet despite wifi connection.

Question

Hello I know that there are plenty of similar topics, but I haven't found any advice anywhere and my case is a bit different. I have a friend's laptop, her laptop connected to the huawei HG8245H (INEA) router for some time, all other devices connect without any problems. However, a...

aachi · Answer

Maybe the antenna cable is broken? Windows may show full range, but the adapter has trouble sending data. Check if by placing your laptop next to the router the network will work a little better.

pawelik2013 · Answer

The router I have has a good range. The distance is maybe 60cm. But what does a wifi cable have to do with wireless connectivity? I will add that the cable connects normally too. I updated the drivers (atheros). According to one advice, entries in the registry were also deleted. No improvement

aachi · Answer

I'll try again then.
There is a wifi card in the laptop (for wireless connectivity) and a cable or two is connected to that card. These cables usually lead to the hatch above the screen. There they are connected to a tiny antenna.

If the cable is broken, it means that the card is not connected to this antenna. Because laptops are energy-efficient, the card in this laptop without this antenna is not able to send a signal with enough power for the router to receive it well.
The router, on the other hand, has so much power that the card is able to receive its signals even without an antenna. The laptop is supposed to connect to the network and shows full signal strength, but in fact, communication is almost impossible. Since these cables often run through the hinge in the hatch, each opening and closing the hatch bends them a bit. They may break after some time.

Place the laptop about 3 cm (three centimeters) from the router and check if the network works in the laptop on the built-in card, although a little better. If so, it is evidently the fault of the cable - the one connecting the wifi card in the laptop with this tiny antenna.

pawelik2013 · Answer

I did not write because there were so many options that I missed. I plugged the rescue drive to the USB. On it, wifi connected normally. That's why I doubt the physical damage to the wifi, because I also took such options, but the test with the usb system ruled out it

KOCUREK1970 · Answer

Since it's W7, you can boot the system in safe mode with networking - test it.

pawelik2013 · Answer

And in safe mode the wifi works. But I noticed that MBAM was showing a message saying that protection is disabled. How to find out what is blocking wifi in normal boot?

KOCUREK1970 · Answer

The most reliable and effective solution. Just remember to get the necessary drivers for this hardware now. Uninstall the program, scan it with some anti-virus.

jprzedworski · Answer

And more specifically?

pawelik2013 · Answer

during the diagnosis made by the system, a message related to dns appeared, and exactly the DNS server may not be available. I read a lot of topics with this type of problem and there is always a problem in DNS. An interesting thing happened. After starting safe mode with network and then restarting Windows, the pages are loading normally, wifi connects but the speed is around 0.5 mb / s. For several hours of such a slow connection, even updates were downloaded. However, after installing it, the problem came back

aachi · Answer

Without loading the computer in Task Manager (Left Ctrl + Left Shift + Esc) check:
- in the "Processes" tab, if something is not overloading your processor
- in the "Network" tab, if something is not using the wifi network

Fire up the command prompt and enter the command:
tracert -d 8.8.8.8
Then paste the result here.

pawelik2013 · Answer

Generally, it is nothing special, what was unnecessary I turned off in autostart. The network shows less than 1% load.

aachi · Answer

You have a giant ping, and packets are going some strange way. Can you confirm you have such a strange router address (192.168.8.102)?

Run the command line, run the commands and paste the results here:
ipconfig / all
netstat -e -s

The laptop should download the network card settings automatically.
Go to "Network and Sharing Center" -> "Change network adapter settings" -> right-click on "Wireless Network Connection" and select "Properties". Then in the new window, select "Internet Protocol Version 4 (TCP / IPv4)" and click "Properties". Nothing should be entered here, and "automatic settings" should be selected. Same on the "Alternative Configuration" tab.

Similarly, check for "Internet Protocol Version 6 (TCP / IPv6)" that the download of settings is automatic.

Boot the laptop from the rescue disk and run this command "tracert -d 8.8.8.8", if this command does not work then try "traceroute -n 8.8.8.8". Paste the result.

pawelik2013 · Answer

Normally on the computer it enters the address of the router 192.168.8.1. IP settings 4 and 6 are automatic Here from the USB system (linux)

aachi · Answer

ipconfig has confirmed that the basic configuration of the wireless card is correct. However, the data provided by netstat is already strange: for example "Forwarded datagrams (ipv4) = 286858" as if this laptop worked as a router. Also a bit weird "ICMPv4 Statistics".

tracert under windows is completely gone into space and I do not know how to explain the garbage that he spat out. As if it was connected to some computer instead of your router ... although that doesn't explain the trash either.

I wonder if you have any entries in the windows \ system32 \ drivers \ etc \ hosts file
Could you paste its contents?

At the command prompt, run the commands and paste what they generate.
route print -4
netsh interface ipv4 show route

There are a few things you can try later. Now I'm shooting blind, but maybe it'll help:
1)
- Disconnect the laptop from the wifi network.
- Go to "Network and Sharing Center" -> "Manage Wireless Networks" and delete all items as are. Log in to the network.

Rather, it won't change anything, but it will make sure that you are not automatically logging in somewhere you don't want to. Maybe some hacker is hacking you :)

2)
Fire up the command prompt in administrator mode and run the commands:

netsh int tcp reset
netsh int ip reset
netsh winsock reset

Then you need to reset your computer. After rebooting, fire again at the command prompt: "tracert -d 8.8.8.8". I wonder if anything will change.

pawelik2013 · Answer

w folderze etc znajdują sie : hosts hosts imhosts.sam network protocol services I did network removal at the beginning, several times

aachi · Answer

I do not know. If only all interfaces on windows did not work, but you wrote that on asus nano it works without any problems. I'm leaving. Tracert returns the laptop's address all the time - as if some NAT was running in the background. Maybe some modified or damaged card drivers, but you also wrote that you reinstalled them. Corrupted or replaced card firmware? Even if I have never seen it before .... otherwise it works fine on Linux.

Maybe some super spec will come in and try to explain what happened here ... I can't explain it. I would also try to reinstall the system. Write later if that fixes the problem.

KOCUREK1970 · Answer

Tip from 08/08 and today 11/08 and the author is still in the forest. What is to blame is looking for a needle in a haystack and when the needle is found, it turns out to be so deeply stuck in the system that only the format.

myszkoscielna · Answer

transfer the post to the Antivirus Emergency Service, scan FRST there and place FRST logs and wait for FRST specialists for further steps. If you do not have any problems with putting the system up again, it will be the fastest solution as advised by its predecessors.

pawelik2013 · Answer

I reinstalled the system and everything returned to normal. Thank you for your help

Laptop with windows 7 does not connect to the internet despite wifi connection.

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