goto start menu, type devmgmt.msc
find and tap on broadcom serial bus driver over uart b.e (thats the one with exclamation point on the photo you posted)
tap 'update driver"
chose manually install driver
browse to the folder (the vi8+ drivers i gave you)
try this one if the above steps fails:
tap on that non working driver
chose uninstall device (mark check on delete the driver software for this device)
on the upper screen of device manager click "action" tab
chose 'scan for hardware changes'
if you can still see an exclamation, chose update driver
then locate the drivers i gave you.