Just updated to windows 8.1 and my BFL SC Jalepeno would no longer work.
Heads up for anyone else having issues, the problem is not with cgminer but the USB driver. You just need to open zadig again and apply the WinUSB driver.
X
USB problems?
Buy a $40 raspberry Pi, grab one of the mining-pre-loaded distros like
MiningPeon --
http://minepeon.com/index.php/Main_Page PiMiner --
http://learn.adafruit.com/piminer-raspberry-pi-bitcoin-miner/And don't worry about windows broken-ness any more... totally worth it.