Contact your local MCGS distributor or post on automation forums like MrPLC.com, PLCforum.uz, or the official MCGS support WeChat group (for Chinese users).
Many regional distributors (like PLC-HMI in the US or IndMart in Australia) host clean copies of the drivers. Ensure the file has a digital signature from "Beijing Kunlun Tongtai Technology Co., Ltd." Mcgs Hmi Usb Driver Download