There are no known problems on windows, but then I have not tried running any hashfast devices on windows since my very first release. You did the WinUSB driver dance with zadig?
Yes I did the moonwalk with Zadig, and earlier releases of cgminer worked well with it!
No idea then. Heck hashfast weren't even looking for windows support from me, I just told them I could get it working on it as an afterthought. You're ALWAYS going to be better off mining with linux with cgminer but I might take a look at losedows soon to see if I can figure out what the problem is. What does it show with "cgminer.exe -n" ?