I think the real problema is the hardware.
So far I have noticed the following:
I have a Toshiba P875-S7200 that has an Atheros AR8162 WiFi adapter that runs 8.1 without trouble.
BUT...
In an Acer Aspire E15 with a QUALCOMM Atheros WiFi adapter the problems occur all the time.
I suspect the issue is with the WiFi card itself rather than that of software... Said Acer model has a Qualcomm Atheros AR956x Wireless Network Adapter. I purposedly downloaded a reference driver for it, installed a different (but compatible) driver for it and on all three instances the connection dropped all the time. Sometimes it ran stable for a few minutes, but eventually dropped or went into "limited mode" again and again. I did the same with the Toshiba and no problems occured.
If I tried to change the AR956x driver it "became alive again" for a short period then drop the connection again. Plane mode didn't work at all. Even turning off or disabling the card in device manager did squat.
Haven't tried using an USB WiFi that DOESN'T use an Atheros chipset yet, but I plan on doing it just to test for faulty hardware CHOICES made by Acer and perhaps some other Laptop assemblers.
And I call them "assemblers" because as far as I know, DELL, HP, Acer, etc; aside from Apple or IBM; only put together hardware pieces but DO NOT manufacture most of the parts contained in their "products". Has anyone ever seen an HP motherboard, memory module, or hard drive?
Me neither... But I have seen HP laptops with IBM Hard drives, Samsung Memory modules and LG LCD flatpanels.