I have 5 of BITMAN U1's, but, even I went through quite a few tutorials, I'm still having troubles running more than 2 of them on 1 system.
Right now I have 3 of them in 1 USB hub (which has additional power supply), and looks like only 2 of them are working:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimg.leprosorium.com%2F2171825&t=663&c=TLGex0tPHT2FlQ)
If I use Zadig to set WinUSB drivers for these, then no miner can see/use my USB erupters, so I have to manually update drivers for each USB device and use drivers from CP210x_VCP_Windows.
Some how, I'm having issues using cgminer, and bfgminers somewhat works. I'm very sorry if this question has been raised already - I'm not native in english and can't find it, I'm probably using wrong search terms. I would appreciate any tips on where should I look or how can I even fix it? Also, here is how my "Devices and Printers" looks like:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimg.leprosorium.com%2F2171830&t=663&c=eh13ncvmZYVXcw)