Driver from TridentMicro.com
Then select "Site Map" (Bottom Left Corner)
Then Select "Driver Download"
Then "Select Product" (Pull Down Menu, on right hand side of Screen)
After you have selected your Product eg TVGA8900, it takes you to the Download file's page, where you choose your Operating System and on then Right of the Operating System is the "File too Download".
Click on the file and away ya go.
(the File Download is a EXE File so pays to download it to a empty directory).