What's wrong with my laptop, with the network?

Since recently disconnected sometimes the wireless and there are no more Wlan displayed, means suddenly my laptop is no longer connected to the Internet. I can't connect it again because no networks are found anymore. I have to restart it every time. Do you know what I can do to make it work smoothly again?

Fritzbox times reseten or network providers call the test your line

It only happens with the laptop. Otherwise the WLAN works everywhere

Maybe a defect in the WLA card. If that's it, it's not so bad. Would be at about 15 euro such a card.

Take a look at yourself: Are you not connected to your (W) LAN or is the Internet access no longer available?

I don't know

Then you should get someone on site to advise who can.
A successful error analysis is only possible if you have at least the most basic knowledge of networks.

I have put back all Lap and the problem among others but also many others are gone

So it should have gone to the WLAN configuration of the laptop. Nice that the problem could be solved.