I solved this by ejecting and inserting the miner stick. I do not know exactly how. Run the cgminer.exe as admin and re-insert the device and see if it works!
I am running cgminer-gekko win32. I have installed the zadiq winUSB driver. When I start cgminer and try to enable the gekkoscience it says [2017-06-22 15:17:38.210] Icarus detect (1:11) failed to initialise (incorrect device?) [2017-06-22 15:17:38.434] USB init, open device failed, err -3, you don't have privilege to access - GEK device 1:11 [2017-06-22 15:17:38.439] See README file included for help [2017-06-22 15:17:38.440] Gekko detect (1:11) failed to initialise (incorrect device?) Sometimes it says "AMU" instead of "GEK".