PdaNet supports both USB Tether and Bluetooth DUN. Your phone can connect to the data service, WiFi...
— Is there PdaNet for Windows 8 64-bit?
You can download the installer which is 32 and 64bit compatible through the link below. If you only need the 64bit executable, then proceed with the download and installation. After this procedure..., go to the installation folder and copy the EXE file to the place you want and that's it.
Download page: http://pdanet.co/a/