Dell insp 560 with 64bit win7 home premium. went to install itunes but get error message " this instalation package could not be opened, verify that the package exists..........." this also happens with adobe acrobat, I cant find anything tangable google wise and after a 6 hour phone / dell rep remote assistance session without any resolution I am at my wits end.Reinstaling the os from the dell disk didnt work either Do I return the system for replacement ? would another dell have the same problem ? or is it a W7 compatability issue and should I go back to Vista ? any thoughts please.