Great solution. I prefer to use, "Realtek_Audio_V6016699_Win8" drivers. This older Realtek OEM driver set seems to work well with no banner and no volume decrease. Still available on the net, just not from Realtek. Using drivers obtained from non OEM sources could be laced. Be careful. The biggest drawback for me is the lack of functions not available in the windows drivers for the Realtek Audio devices. I miss the "EQ" the most. As it turns out, it's not Realtek, or Microsoft alone. Only certain computers (and devices) do it. I have a Samsucks that used to do it. No wonder they got out of the laptop game. Microsoft, computer builders, and Realtek are all to blame. Some builders need it to conform to some dumb euro law, yet they still implement this banner for no good reason on devices sold in the U.S.A. Microsoft made the banner possible, builders demanded it, and Realtek said yes sirs. I have been using the older 6016699 driver for a few months now. Audio works well, I have my EQ, and I never see the banner. This only came after months of frustration. Even thoughts of a youtube video involving a laptop and sledgehammer.
good luck
-Macguyver