the 8188CUS driver will work. I examined the inf file, and the vid/pid ( 0BDA 8176 ) for this model is included. Note: I'm using a netis usb 2.0 N150 that id's with that chipset. Windows 8.1 has a built in driver from 2012 which works, but Realtek offers a driver from 2014. You'll notice after instal, the date shows 2013, but the driver version updates to the realtek 2014 version.
I checked a couple other drivers on the site, and they all offer 2012 drivers, so maybe this is the most current.
There are lots of other drivers for win7, xp, linux , android, etc there as well.
I'd suggest going into device manager and editing the device's advanced settings - limiting the bandwidth to 20mhz, instead of 20-40mhz. I always have trouble with that.
As an aside, i downloaded an amd 300mb driver using the microsoft driver, and downloaded it again immediately after the wifi driver update. Speed was 450KB/s first time, and >1.0MB/s with the realtek driver. About 10 mins apart, at 5am - so could be other factors, who knows.
http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=21&PFid=48&Level=5&Conn=4&DownTypeID=3&GetDown=false&Downloads=true