Problems installing scan drivers Epson Perfection V500

Just purchased Perfection V500 Can't install scan software. I get an error " Could not copy File" "Check the setup disc then run setup again C:\User\Appdata\Local\Temp\\setup.ini
I'm running an HP PC Core Duo Quad Q6600, 4 GB RAM, Vista Home Premium 64 bit SP1. Spent 1.5 hours on the phone with Epson yesterday until tech said he had done everything he had on his troubleshooting checklist then put me back on hold for another tech and ended up back on hold. Anyone have an idea? This is my first problem with Vista. I was hesitant to get involved with it in the first place. Epson promotes the scanner as compatable with Vista 64. And I have seen posting that indicate success for others running the scanner. Thanks