All the networks, when connected, display an unknown network without internet access.

I have a laptop windows 7, and all recently internet my laptop has stopped working. Each network I want to connect to always says that he is an unknown network and that it is connected but has no internet connection. Anyone know what could be causing this? I can't update my drivers, as I do not have to download it from internet. One of my friends recently tried to configure something to its WiFi network via my computer, something in this direction, pourrait it screwed my computer somehow?

Hello

Thank you for contacting Microsoft Community.
Perform the following steps in order:
1. click on start.
2. type network and sharing Center , and then press ENTER.
3. in the left pane, click on change the parameters of the map.
4. Select the network adapter appropriate (wireless or wired).
5. right-click on it and click on Properties.
6. in the Properties dialog box opening, networking, tab scroll down until you see Internet Protocol Version 4 (TCP/IPv4).
7. select it, and then click Properties.
8. in the dialog box, select IP address get automatically and DNS server automatically get an address.
9. go to the next (alternate Configuration) tab.
10. Select automatic private IP address.
11. click on Ok.
12. click on Ok.
13. repeat the steps for WLAN and wired connections.
14. now, try to connect to a network and check.
If the problem persists, click Start-> type cmd-> press ENTER. Type ipconfig/all, press ENTER, and then provide the information displayed there.

Tags: Windows

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