Re: BFGMiner 4.1.0: modular ASIC+FPGA, GBT+Strtm, RPC, Mac/Lnx/W64, NF6,OSM/HxFy,DMR
Could you provide a little more detail, please? I'm uncertain what to do with this INF file, as I'm assuming from your post I actually need the drivers from elsewhere but am not sure where to obtain them. I presume I need the INF file to install the drivers. I have the official (non-zadig) drivers installed (noted above) but you remarked they are not the same. Any clarification you could offer would be much appreciated 
When Windows prompts you to install a driver, one of the options is to browse for an INF file. In this case browse to the GridSeed INF file found in the link I provided.
In the case of Windows 7 and 8 and 8.1 you will need to take extra steps (different for each) to install unsigned drivers.
However, I have the same problem that Oldminer mentioned above: BFGminer find the Gridseed Orbs and mines fine for the first while. After about 30 or so minutes, the speed drops and they eventually stop accepting shares. I have read about the FIFO buffers and tried messing with those, but it seems to behave the same with them enabled or disabled. Any ideas? I'm using BFGminer 4.1 on Windows 7.