..If the drive installation is from a CD, then first, prevent it from "autorunning", then open the CD drive, RIGHT click on the "setup.exe" file in the CD file listings, choose "Run as administrator".. It should then install correctly.
On the other hand, if the drive is a downloaded file, say on your desktop, then RIGHT click directly on the file, choose "Run as administrator".
Hope this helps.
Bought a new Epson NX420 Printer a month ago and installed it and everything was working fine with Windows 7 HP Pavillion computer. Then a different user tried printing something and print job got stuck in queue and wouldn't print.So after trying many different options and nothing I tried uninstalling and re-installing printer. Now when I try to do the installation it lets me install everything till it gets to driver and I get error message saying Can't install printer access is denied. I am running it thru an administrator account so I don't know why I am getting this error..