Here are the drivers for Redmi 6 XR6 smartphone by Xiaomi. Redmi 6 XR6 is powered by Mediatek chipset so here you can also download its MTK Vcom Preloader–usb drivers as well as pc usb drivers and adb fastboot drivers. These driver are working and tested .
Download Xiaomi Redmi 6 XR6 MTK Vcom Preloader ADB USB Drivers
Supported OS : Windows XP / Windows Vista / Windows 7 / Windows 8 / Windows 8.1 / Windows 10 both 32 and 64 bit