Windows 10: using ethernet connect 1 computer to another computer's wifi, not working no more

computer1 is win10

computer2 is win7

computer2 wifi has been set as to shared, wifi properties --> sharing --->allow other network users to connect through this computer's internet

then I use a cable to connect the 2 computers, it worked before, and today I got a windows update, and then it's not working no more, saying "unidentified network", and when I diagnose the ethernet, it says ethernet doesn't have a valid ip configuration.


every time windows update giving me troubles, last time my keyboards can't even type a few of letters.


I tried the following methods but no use:

from the Ethernet Properties window, select Internet Protocol Version 4 TCP/IPv4 and click on Properties.

Obtain an IP Address Automatically
Obtain DNS Server Address Automatically

Command Prompt opens, enter the following commands:
netsh winsock reset
netsh int IP reset





Disable IPv6

:)

 

WIFI Works, Ethernet won't

OK but why?

NOT YELLING, JUST EMPHASIZING

Please note, I installed the new Lynksis, it worked just fine for 3-4 days on both my MACBOOK PRO when in ethernet connect and the Dell, then the ethernet just quit working for both my MacBook Pro and Dell desktop. It did work, then just quit for no apparent reason. WIFi for iPhone, iPad, Andriod Phone, and when I set to wifi for my MacBook pro all work fine.

Detailed history: I first noticed that on my Desktop dell that is CAT5 ethernet connected to the WIFI ROuter, that it stopped, no internet access. I began to trouble shoot, and turned off my WIFI on my MAcbook and it wouldnt work either, plugged into same router but different cat5 cable. At that time, all WIFI devices still worked. I figured that it must be the ethernet side of the WIFI router, so I replaced the router with brand new one. the Lynksys N900 listed in original thread. Ethernet and everything worked just fine for 3-4 days. But then ethernet quit, but wifi still works.

Whatever the problem, it affects both my MacBook Pro and Dell with WIN 7. I'm guessing it is NOT a computer problem, if it is it is affecting both my Mac and Dell, separate cat 5 cables to same wifi router

To remixedcat, I don't know for sure how to check IP settings, see above post, no damage apparent to anything.

 

Wifi stops working when using ethernet

If the computer is unplugged from the ethernet, does the wifi work?

 

ethernet computer does not show wifi computer in file explorer network list

My desktop computer is connected to my router with ethernet & does not show my WiFi connected laptop computer in the file explorer network list in the left pane. The desktop computer does list itself in the network list. The laptop shows both computers
in its network list. This worked a couple weeks ago before a windows 10 update was done on both computers. I've tried just about everything with no luck. What could be the problem?