I confirm the Antivirus Program as the culprit. In my case it has been Kaspersky Version 15. After upgrading to KIS 16 all LAN NICs were on the network adapter list and working fine.
NIC concerned: RealTek PCIe GBE and Intel I210-T1.
By the way, RaLink 802.11n Wireless was up and running all the time. Fortunately!
I found that W10-pro is behaving different from W10-home. W10-pro is allowed to run GPedit.exe to control a lot of settings by hand. W10- home is not allowed to run it.
One would think that W10-pro is better? Well I find W10-home is far more relaxed and working like the old W7-pro in matters of sharing and IP-connections.
Same problem but after a smooth upgrade. Upgraded to Windows 10 from Windows 7 back in August. Everything was fine until recently. Windows does not detect the NIC the first time. I have to restart the machine in order for it to recognize the NIC. Sometimes I get the error msg start menu and cotrana are not working.
The question remains over here as I see that W10-home is showing me on mouseclick all devices in the home network and W10-pro is searching and searching and after a while only finds its own shared folder.
Calling Microsoft Netherlands they told me that the solution would be to downgrade to W10-home or go back to W7-pro. The latest would be the easiest as this option is build-in W10 from start on.
I too lost my network adapter. and hence my wi-fi. I restored to a previous date and now my adapter and wifi is working again. This is not the first time my adapter disappeared. I suspect it will happen again some time. Anybody got a permanent fix?
Yesterday I was surfing on my Acer 10" 2 in one without any issues. Today, No network Adapter to be found and I am getting error code 45 that the Network adapter is not properly installed. So what do I do if there is no rollback option?
As soon as I deleted the Kapersky Internet software my realtech card appeared. I didn't even have to reboot.