Uninstall it then re-install by using administration rights ( right click the install program and run as administrator)... Once installed run the application in the same fashion... You should only need to do it once..
Thanks for the reply Ian
I found the problem. when installing the driver I got The hash for the file is not present in the specified catalog file. The file is likely corrupt or the victim of tampering.
I was thinking I need a windows 8 driver. In fact I found a page with a driver. CP210x USB to UART Bridge VCP Drivers. **broken link removed**
But could not get it to install.
Then I found a solution that disables Windows 8 checking of the driver's signature
From the Metro Start Screen, open Settings (move your mouse to the bottom-right-corner of the screen and wait for the pop-out bar to appear, then click the Gear icon).
Click ‘More PC Settings’.
Click ‘General’.
Scroll down, and click ‘Restart now’ under ‘Advanced startup’.
Wait a bit.
Click ‘Troubleshoot’.
Click ‘Advanced Options’
Click ‘Windows Startup Settings’
Click Restart.
When your computer restarts, select ‘Disable driver signature enforcement‘ from the list
It now works! (The driver installs)
Shame I could not get the windows 8 drive to work. Any clues?