I've noticed since upgrading to Win10, sometimes the network doesn't appear at all.
I used to have a similar problem with Win7, though that got solved when I put a static internal IP on the computer/windows.
But on Win10, the network connection just isn't there. The only network connections in the control panel are bluetooth. If I restart Win10 it will mostly re-appear and I have connection to the net.
Could this be a driver issue?
I've noticed that the Windows Update in Win10 isn't as comprehensive as it is in, well at least XP. In XP there was lots of optional updates to do with hardware. But in Win10 updates I've never seen it. The only non-OS update was the HP Printer (and it got that wrong).
Maybe I'm missing the section on non-OS updates? Does Win10 update have that, or have they dropped it?