Even if it seems somehow bios related, in the advanced driver options try to disable any Green Ethernet, or Energy optimization it might have. Some adapters can try to cut power depending on estimated cable length when those options are on, and cause intermittent failures.
No, just continues to disconnect. Tried a windows network reset along with various net commands to flush DNS, renew IP etc.. no dice. Turned off power saving (seems to fix some peoples issue with internet adapter reported on the net), no change. Only turning off Ultra-fast boot to either off or standard/fast in the bios resolves the issue.
I think I'd just bite the bullet and use standard/fast boot then. Sounds like a hardware initialization issue caused by a buggy bios.
[FONT="]This. How much of a difference does it make? I never notice boot times as I power on and go make a mug of the world’s best coffee. I get what seems to be effectively instantaneous start up no matter how slow the machine is.[/FONT]