Symptom After installing a Windows 10 Update, the following devices are no longer recognized: TRAKTOR KONTROL S4 MK2 MASCHINE STUDIO KOMPLETE KONTROL S-Series MK1 (all models) Cause The Windows 10 Updates KB4487017 and KB4487044 from February 12th, 2019 block certain NI hardware devices from being recognized. 搞定了 ······win10害人不浅呀