After almost 4 yrs, Focusrite releases a new stable Windows driver for Scarlett 2i4 1st gen usb interface (apparently, the new driver is not officially available for others devices from 1st generation - only for Scarlett 2i4).
Plus, the new driver is available for Scarlett Solo (2nd gen), 2i2 (2nd gen) and 2i4 (2nd gen).
https://us.focusrite.com/downloads Regards
Edit: wrong place, sorry (please move it, thx)