Need Generic USB 2.0 WLAN drivers!

Ok, updating my sister's PC to windows 8.1 it has no drivers for her wireless adaptor. It's a SMCWUSBS-N4 wireless N adapter. It works in in windows 7. Going 5 bars @ 150Mbps with no issues. Here's the website: http://www.smc.com/en-global/products/product/46


If anybody can jimmy rig this or find generic realtek/tp-link drivers for this it would be great.

PS. Already tried doing all the x64 drivers on the page, so don't suggest that.

It seems to be using an Atheros 9271 chip, which for what I can see has not gotten any official driver for Windows 8.1.

I'd look for some new cheap wifi stick.