Once the Preloader successfully communicates with the host PC, it loads the Download Agent (DA) into the chip's RAM. The device re-enumerates—this time as a different VID/PID—and requires the DA-specific VCOM driver. This port is used for actual read/write operations to NAND/eMMC/UFS storage.
Under normal circumstances, you will never interact with these drivers. They are background utilities required only for advanced operations. The most common scenarios include: mediatek usb vcom drivers
Microsoft has tightened security, preventing the installation of drivers that lack a verified digital signature. Many older versions of the MediaTek VCOM driver (and even some newer ones) are unsigned. Consequently, users often encounter a "Hash for file is not present" error or find that the driver simply refuses to install. Once the Preloader successfully communicates with the host