WiFi (no network access)

Hello

I use HP Compaq 15 a00t2u, windows 7 ultimate 64-bit. I am not able to connect to internet via WiFi. Whenever I log in, it says: "no access to the network." There is a yellow triangle on the WiFi icon. Windows diagonsed she, but failed to correct. A message appears 'wireless network connection is not a valid IP address. Sometimes this resolves the problem, but a few seconds, the new issue pops up.

PS: I am able to connect my mobile and other devices via a router even. Also, when I turn on my Wifi Tethering mobile computer laptop connects to the network easily without any problem.

Thank you

Very well! I'm really sorry, but there was a problem with my router. Just reset and everything is fine now!

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