I am using a Toshiba Satellite C660/C660D which is running a 64 bit version of Windows 7 OS. I recently tried downloading a 64but version of Apple itunes so that I could easily upload songs and videos in my iPod. But everytime I tried downloading the setup file I was getting this particular message. “This installation package cannot be opened. Verify the package extensions…”. Now I am trying to uninstall the itunes but I am unable to do so. Anyone have any solution then please help me.