I purchased a Epson WorkForce

I purchased a Epson WorkForce 600 multifunction wireless printer and installed it just fine onto my desktop computer through a wireless router. My desktop using Windows XP Professional. When I followed the instruction of the manual to set it up on my wireless laptop that has Windows Vista Premium 32 bit, I cannot get it to install. The very first screen starts out with installing Epson Scan software or drivers and about 40% into the install, I get an error message saying that it cannot copy files. Then I cannot go any further. What can I do to add my wireless printer to my laptop. I chose the "add another computer to the network" button as the manual said to do. Please help. Thank you