Hello. A friend of mine recently did a fresh install of Win 7 64 bit. He has a Repotec adapter, which, when we download the drivers for from the site (from his phone tethered to the PC), It doesn't contain an install, just a .rar with .sys and .dll files. I have not stumbled upon such a thing yet and both of us have no ideas. The disk that comes with the adapter contains the same kind of files.
Link to the adapter: http://www.repotec.com/products/Switch_Adapter/EthernetAdapter/RP_3200EX/RP_3200EX_11.asp
Screenshot to what the folder looks like: http://prntscr.com/axhbh7
Link to the adapter: http://www.repotec.com/products/Switch_Adapter/EthernetAdapter/RP_3200EX/RP_3200EX_11.asp
Screenshot to what the folder looks like: http://prntscr.com/axhbh7