I WANT TO GET MY USB SCANNER TO WORK.BUT THE DRIVER IS NOT INSTALLED PROPERLY,I NEED TO INSTALL USPSUPP.EXE BUT WHEN I TRY TO INSTALL IT MY COMPUTOR SAYS IT IS ALREADY INSTALLED AND THAT I NEED TO UNINSTALL THE PREVIOUS VERSION,I CANNOT NOT FIND IT ANYWHERE,I HAVE DOWN LOADED A LOT OF DOCUMENTATION WHICH TELLS ME WHAT TO DO BUT MY COMPUTOR KEEPS CRASHING.PLEEESE HELP