To install the driver file for the MediaTek DA USB VCOM Preloader (Android) Driver follow the steps below.
You may need to do a forced install which you can learn about here: How to Force Install a Driver
In the device manager, right click on the device and go to update driver. Browse to the location of the extracted driver and select the driver and install.
MediaTek MT67xx USB VCOM Preloader Drivers
File: MT67xx USB VCOM.zip
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Chip-sets compatible: MT6735, MT6735M, MT6737, MT6737M, MT6752, MT6753, MT6755/helio P10, Helio x10, Helio p20, helio X20, helio x25, MT6797, MT6795