Kw88 flashing problem

So i tried to upgrade my kw88 ti the latest firmware after watchibg all the videos.I connected the kw88 by mtp uab with my p.c.Then i tried to flash it but my p.c does not recognise the watch and their is no sign that the switched off watch is connected to my p.c .Please explain how to install the vcom drivers or any other drivers that are required.I have windows 7 64 bits and i have also seen the video about the update but it’s for Windows 10 and i am ynable to figure out how to update.It would be very nice if someone helped me out in this case.Thanks