Im sorry, i dont have windows 8.1 anymore. I installed windows 7 and now everything is fine. Anyway i will send you what you asking for, just for win7.
Btw, can you help me with driver for USB controller (8 Series USB xHCI HC, VEN_8086&DEV_9C31&SUBSYS_201F1043) for win 7, i cant find it anywhere).
Best regards,
Antonio