Hi Alexey, Thank you for posting your query in Microsoft Community. Appreciate your interest in using Windows 10 and your efforts in solving the issue. I would like to ask the make and model of the Computer in order to assist you better. Also, I would suggest you to refer the link below and follow the steps provided to identify and fix problems with Wi-Fi network connections. Hope the information is helpful. Feel free to write is back for any other assistance with Windows, we’ll be glad to assist you.
I have exact same problem. Ethernet works fine, wifi does not. I actually uninstalled the wifi adaptor, then shut down windows 10, rebooted. After that the wifi adaptor was visible again. I then updated the driver, but the wifi networks are either not connecting at all or even they are connecting, the connection breaks often.
Solved: Did a clean install of Windows 8.1 and on the page my laptop no drivers for Intel Centrino Wireless N 2230 wifi and Bluetooth. Help to find - 4136432. Jan 21, 2016 Using an HP Envy m6-1158CA with an Intel Centrino wireless n-2230 card. On Windows 8.0 x64, using driver version Intel 15.5 or 15.10.x, I have no problems.
Prior to upgrade there was no problem. Lenovo Battery Driver Windows 10 there. Other machines on the same network which are Windows 7, 8, Vista do not have this problem at all, hence it is not even a router problem.