You could also try the ASUS PCE-AC68 driver (see my post at the top of page 2) however the v7.35.338.0 driver from station-drivers has been stable all the way for me (steady download speed), although...

If you're using Windows 7, you should try the updated drivers from the Support pages: EU or US depending on your region. If you're using Windows 10, try the driver for the ASUS PCE-AC68 or the...

For anyone who stumbles upon this thread, here is the current situation with this device: * The v6.30.223.228 driver distributed by TP-Link is for Windows 8. The "V1_151026" driver is referenced as a...