Sometimes when students attempt to install Packet Tracer (maybe after one or more previous install attempts), they get an error saying something like:
"C:\Program Files (x86)\Cisco Packet Tracer 8.0.1\saves\7.3.1\DHCP\ipv6statefuldhcpv6prefixlength80.pkt
The existing file is marked a read-only.
Click Retry to remove the read-only attribute and try again, Ignore to skip this file, or Abort to cancel installation."
I wish the install program could be built to automatically take care of this issue, especially for new students who may not be savvy enough to delete previous folders, uninstall previous versions of PT, etc.