It depends on which board you have - if it has an FTDI chip, Windows should detect and install the drivers automatically. If not, download the VCP driver here:
ftdichip.com/Drivers/VCP.htm
If your board has an Atmel chip, it should be detected since you’ve already gone through the procedure of manually installing the Uno drivers.
and unfort that does not work. Followed the driver install from the VCP page to no avail.
Can you upload a clear image or two of the PCB?