USB Drivers are needed for almost all products. You only need one driver package for ALL Moates USB products. One for all and all for one? 
You can find drivers we know work for Windows 2000/XP/Vista can be downloaded by clicking here There is a Vista Specific Guide that may be helpful to those running Vista.
You can find drivers we know work for Windows 98/ME can be downloaded by clicking here
OR you can find the latest drivers available directly from the USB chip’s manufacturer here.
Tip: it is recommended that you use the drivers from our site unless you have issues – sometimes the latest generic drivers have odd quirks/bugs. These drivers can be handy if you have conflicts with other devices on the system.
If you have trouble, start with this troubleshooting guide.
If you have trouble, you may also want to look at FTDI’s Installation Guides for your OS.
[...] USB Drivers – FTCLEANUSB Driver Troubleshooting 101USB Driver InstallationTroubleshooting: HULOG / HondalogFirmware: [...]
[...] Disconnect all USB devices, close all software, and re-install USB drivers. See here. If you suspect that your drivers may be confused, use the FTCLEAN procedure outlined [...]